I've had the same problem. I had to go back to my notes from my 1rep tests and reenter my numbers again. When I went back to rekey my entries, I noticed the system did have about 40% of the original entries I had put in there but mysteriously did not have the rest. I can only assume SNM updated the workout manager software to fix a bug or two and some of our data got lost in the process. I know it was not user error (be sure you are logged in, be sure to click save, etc.) as was suggested in other threads. Everything seems to be staying in there now for me these last couple of weeks. Good luck.