I'm thinking Top Shot didn't want George to win - the guy was a huge dick from day one (albeit, a kickass shooter).
I don't know whether he screwed the pooch on the Sharps shot or not - it makes a much better storyline for the show going the route it did instead of a dickhead wiping out the "nice" guy everyone ended up rooting for.
I have a feeling George is going to get his money one way or another.