USC is #3?

I don't understand how USC jumped over Florida in the BCS rankings. It doesn't matter too much anyway, because my other favorite team, Cal, is going to beat USC this Saturday and Florida will move into 2nd place behind the winner of Ohio State - Michigan. Florida plays the tougher schedule, but USC started out the season higher, so who knows. Now that Cal's chances for the top 8 are pretty distant, I'll have to hope that USC loses. If Cal wins their remaining games, maybe they can still get in the top 10.