Sorting columns with different size merged cells

[roc_ent]

Hi all, I'm in a bit of a pickle here trying to sort a workbook where I get an error message saying merged cells must all be the same size. Is there any way to get around this. I thought I was on the right track by spacing every column at 3.71 each from A to W. However, I did merge A and B as my date; C is (so far blank) ; then my account column is D to H, etc. What I'm trying to do is to sort by date and month in numerical order but now its not working for me. Any help would be much appreciated. TIA

 

[6StringJazzer]

Answer: Do not merge cells