Look at the cells in yellow:
I think that your's formulas isn't ok. The values in column D are before the value in the cell C16 (D9 and D10 are < C16).
<b>Excel 2007</b><table cellpadding="2.5px" rules="all" style=";background-color: #FFFFFF;border: 1px solid;border-collapse: collapse; border-color: #A6AAB6"><colgroup><col width="25px" style="background-color: #E0E0F0" /><col /><col /><col /><col /><col /></colgroup><thead><tr style=" background-color: #E0E0F0;text-align: center;color: #161120"><th></th><th>C</th><th>D</th><th>E</th><th>F</th><th>G</th></tr></thead><tbody><tr ><td style="color: #161120;text-align: center;">1</td><td style="text-align: right;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">2</td><td style="text-align: right;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;">new formula</td><td style="text-align: center;;">your formula</td></tr><tr ><td style="color: #161120;text-align: center;">3</td><td style="text-align: right;;"></td><td style="text-align: center;;">10/26/2007</td><td style="text-align: center;;">8/12/2008</td><td style="text-align: center;;">41</td><td style="text-align: center;;">41</td></tr><tr ><td style="color: #161120;text-align: center;">4</td><td style="text-align: right;;"></td><td style="text-align: center;;">5/4/2009</td><td style="text-align: center;;"></td><td style="text-align: center;;">92</td><td style="text-align: center;;">92</td></tr><tr ><td style="color: #161120;text-align: center;">5</td><td style="text-align: right;;"></td><td style="text-align: center;;">2/8/1992</td><td style="text-align: center;;"></td><td style="text-align: center;;">208</td><td style="text-align: center;;">208</td></tr><tr ><td style="color: #161120;text-align: center;">6</td><td style="text-align: right;;"></td><td style="text-align: center;;">2/25/2010</td><td style="text-align: center;;">3/4/2010</td><td style="text-align: center;;">1</td><td style="text-align: center;;">1</td></tr><tr ><td style="color: #161120;text-align: center;">7</td><td style="text-align: right;;"></td><td style="text-align: center;;">10/19/2009</td><td style="text-align: center;;">5/7/2010</td><td style="text-align: center;;">28</td><td style="text-align: center;;">28</td></tr><tr ><td style="color: #161120;text-align: center;">8</td><td style="text-align: right;;"></td><td style="text-align: center;;">10/10/2010</td><td style="text-align: center;;"></td><td style="text-align: center;;">17</td><td style="text-align: center;;">17</td></tr><tr ><td style="color: #161120;text-align: center;">9</td><td style="text-align: right;;"></td><td style="text-align: center;background-color: #FFFF00;;">11/27/2006</td><td style="text-align: center;;">8/21/2009</td><td style="text-align: center;background-color: #FFFF00;;">132</td><td style="text-align: center;background-color: #FFFF00;;">142</td></tr><tr ><td style="color: #161120;text-align: center;">10</td><td style="text-align: right;;"></td><td style="text-align: center;background-color: #FFFF00;;">10/9/2006</td><td style="text-align: center;;">5/2/2008</td><td style="text-align: center;background-color: #FFFF00;;">64</td><td style="text-align: center;background-color: #FFFF00;;">81</td></tr><tr ><td style="color: #161120;text-align: center;">11</td><td style="text-align: right;;"></td><td style="text-align: center;;">6/23/2009</td><td style="text-align: center;;"></td><td style="text-align: center;;">84</td><td style="text-align: center;;">84</td></tr><tr ><td style="color: #161120;text-align: center;">12</td><td style="text-align: right;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;"></td><td style="text-align: center;;"></td></tr><tr ><td style="color: #161120;text-align: center;">13</td><td style="text-align: right;;"></td><td style="text-align: center;;">****</td><td style="text-align: center;;">****</td><td style="text-align: center;;">****</td><td style="text-align: center;;">****</td></tr><tr ><td style="color: #161120;text-align: center;">14</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr><tr ><td style="color: #161120;text-align: center;">15</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr><tr ><td style="color: #161120;text-align: center;">16</td><td style="text-align: right;;">2/7/2007</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr><tr ><td style="color: #161120;text-align: center;">17</td><td style="text-align: right;;">2/7/2011</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr><tr ><td style="color: #161120;text-align: center;">18</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr><tr ><td style="color: #161120;text-align: center;">19</td><td style="text-align: center;;">****</td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td><td style="text-align: right;;"></td></tr></tbody></table><p style="width:3.6em;font-weight:bold;margin:0;padding:0.2em 0.6em 0.2em 0.5em;border: 1px solid #A6AAB6;border-top:none;text-align: center;background-color: #E0E0F0;color: #161120">Sheet3</p><br /><br /><table width="85%" cellpadding="2.5px" rules="all" style=";border: 2px solid black;border-collapse:collapse;padding: 0.4em;background-color: #FFFFFF" ><tr><td style="padding:6px" ><b>Worksheet Formulas</b><table cellpadding="2.5px" width="100%" rules="all" style="border: 1px solid;text-align:center;background-color: #FFFFFF;border-collapse: collapse; border-color: #A6AAB6"><thead><tr style=" background-color: #E0E0F0;color: #161120"><th width="10px">Cell</th><th style="text-align:left;padding-left:5px;">Formula</th></tr></thead><tbody><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">F3</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">IF(<font color="Green">OR(<font color="Purple">E3>$C$17,E3=""</font>),$C$17,E3</font>)-IF(<font color="Green">D3<$C$16,$C$16,D3</font>)</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">G3</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">E3-D3</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">F4</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">IF(<font color="Green">OR(<font color="Purple">E4>$C$17,E4=""</font>),$C$17,E4</font>)-IF(<font color="Green">D4<$C$16,$C$16,D4</font>)</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">G4</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">$C$17-D4</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">F5</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">IF(<font color="Green">OR(<font color="Purple">E5>$C$17,E5=""</font>),$C$17,E5</font>)-IF(<font color="Green">D5<$C$16,$C$16,D5</font>)</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">G5</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">$C17-$C16</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">F6</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">IF(<font color="Green">OR(<font color="Purple">E6>$C$17,E6=""</font>),$C$17,E6</font>)-IF(<font color="Green">D6<$C$16,$C$16,D6</font>)</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">G6</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">E6-D6</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">F7</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">IF(<font color="Green">OR(<font color="Purple">E7>$C$17,E7=""</font>),$C$17,E7</font>)-IF(<font color="Green">D7<$C$16,$C$16,D7</font>)</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">G7</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">E7-D7</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">F8</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">IF(<font color="Green">OR(<font color="Purple">E8>$C$17,E8=""</font>),$C$17,E8</font>)-IF(<font color="Green">D8<$C$16,$C$16,D8</font>)</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">G8</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">$C$17-D8</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">F9</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">IF(<font color="Green">OR(<font color="Purple">E9>$C$17,E9=""</font>),$C$17,E9</font>)-IF(<font color="Green">D9<$C$16,$C$16,D9</font>)</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">G9</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">E9-D9</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">F10</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">IF(<font color="Green">OR(<font color="Purple">E10>$C$17,E10=""</font>),$C$17,E10</font>)-IF(<font color="Green">D10<$C$16,$C$16,D10</font>)</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">G10</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">E10-D10</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">F11</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">IF(<font color="Green">OR(<font color="Purple">E11>$C$17,E11=""</font>),$C$17,E11</font>)-IF(<font color="Green">D11<$C$16,$C$16,D11</font>)</font>)/7</font>)</td></tr><tr><th width="10px" style=" background-color: #E0E0F0;color: #161120">G11</th><td style="text-align:left">=INT(<font color="Blue">(<font color="Red">$C17-D11</font>)/7</font>)</td></tr></tbody></table></td></tr></table><br />
Markmzz