Problem found.
Consider this when you make a contest (example):
-a member has 10 posts and 5 topics made
-other member has 6 posts and 2 topics made
You think, sure, the first one will win he is more active, but the way you did it, it makes the second one to win:
10/5=2pts
6/2=3pts
That's not logic, please consider that in the next contest Cyan.