I have the same issue and it's annoying me. I had scored about 600-700 goals and conceeded around 150-200 i think it was, but now it said by the start of this new season that i have scored 178 and conceeded 178 and that my player András Horváth has scored 71 goals in a match which isn't correct and completely off target. Those 71 goals is what he has scored throughout his career in my club. The player which has scored the most in a match is Dan Poulsen by 5 goals, which by the way is more realistic. I hope it gets fixed soon, so that i get my correct numbers back.