Seriously? read what you just said "Your grandpa sponsored us for around 4 years...and no.. I do not believe he was paying my players to beat his team on the field."
I hate to break it to you but they were both his teams. That's what comes with being the sponsor. Are you seriously trying to argue that he wouldn't want his AA team that he sponsored to beat the A team that he sponsored?
Again, not my place to share details. Sorry that is probably not the answer you want.