Louisville jumps bama this week.  The main difference maker is USC's loss to Utah.  While the USC win is helpful to bama, they are only 1-3 so it's hard to view them as a great win anymore.
Easily won over Marshall, I saw no reason to move them from their number 2 spot. They travel to Clemson next week, so I anticipate this clog at the top to work itself out rather quickly. 
The Louisville win over Florida State may still be the most impressive win of the season. FSU's defense looked a bit shaky this week, but they do have a win over Ole Miss.