This makes me nervous. It is very difficult to beat the same team twice in one season.
This is a myth (similar to the basketball myth that it's tough to beat a team three times) that is not backed up by facts. While it rarely happens in college football that a team meets twice in the same season, it does happen occasionally. In terms of the MAC Championship games, there have been four times where it has been a rematch of a regular season game. In those four games, three times the team that won the first time won the second time as well.
Right, if a team won a game that could have gone either way, that's one thing, but most of the time, a team wins the first time or two because it is better. Nothing changes the third time.
That said, I certainly don't think Ohio is as much better than Toledo as it looked tonight. Coming into the game, evidence probably pointed toward Toledo being the slightly better overall team. Not true anymore, but form one game to the next, things can change a lot. I would not expect Ohio to win so handily a second time around.