So its interesting - if I comment out the cell.initialize it does not crash. What happens is the values in the cells after cell 5 get all mixed up. For example if I add cell #6, the value is what was stored in cell 1 and cell 1 value has cell #6 value. It seems to have to do with the scolling and the visible cells on the screen. I can send you the project if that would help AND you have the time.

So the issue is when the user enters data into on of the cells (reps or lbs) and has not than 5 sets - when you scroll left and right to see the data the index get all messed up and the original data chnges. Does that make sense?