Hello!
These two functions seem identical to me:
=IF(D46<$J8,IF(D29=0,IF(D30=0,0,"BOTTLENECK"),D29/($J8-COLUMNS($D49:D49))),0)
=IF(D46<$J9,IF(D32=0,IF(D33=0,0,"BOTTLENECK"),D32/($J9-COLUMNS($D50:D50))),0)
The input cells are exactly the same, D29=0 and D30=431 with the only difference being...