That is because Michael Phelps can not possibly be that strong, so the calculator takes necessary measures by making him weaker

just kidding. That is strange. I remade the formulas in that column yesterday night. I believe it should be fixed in the uploaded version currently. If not, I'll check it after work.
As for the second problem (growth rate for white and grey skills) its an easy fix. I just forgot fixing it. I'll have it implemented tonight after work.
What should be the maximum for input values? I can change it but I don't know what the max is.
Thanks for testing the calculator mate, appreciate it.