I guess you lost me in your OP on this statement:
Are team A and B playing each other or are these two different games? Is this not, in fact, the same bet twice? If Team A wins you win both bets. If Team B wins you lose both bets.
I don't understand.
Lets take tonights game for example Colts at Jags. Colts are a 3.5 point favorite. So you would bet Colts on the first site and Jags on the 2nd.
I'm more than willing to discuss in extreme detail via PM (or skype, phone, in person) with somebody.
One other large question that has been asked is:
Why don't you just do this with your own 15 BTC?Answer is that I COULD, but what you need to realize is that for every 15BTC being put down there's another ~165$ being wagered on the other site. So if you think of this in the long run we could easily be hedging at 1000 BTC per day i.e. 50BTC return.
I say it before and I'll say it again: I'm more than willing to give exact detail on how this is done. From point a to point b. Shoot I'll even give personal info if I have to, but I feel as if people are seeking information now and trying to do it on their own.