Macros built & tested on a MAC not performing properly on windows Excel

Team Excelforum, I have built the attached form on a Mac Excel and e-mailed it to me at work and the "Stop" #2 thru 45 does not work properly. It continues to update the "Off Duty" in the first cell (column AH7) but does update the hours in column "Y".

The Macro for Stop_1 is in Module 9, Stops 3 thru 45 are in Module 5.

I would appreciate someone letting me know why this is happening.