Okay, so ive noticed that when after i up vote something it says remove up vote instead of up vote again, but in challenges its says:
Winner-10 upvotes
Second- 5 upvotes
Third- 3 upvotes
E.T.C.

But what i would like to know is how do you up vote something more than once? is it a mod? Hack? Acheivment? Assumption? what is it? i hope someone knows the definitive answer, but any response is welcome...