Have you made any deposits or withdrawals? Did you use and FPP's the week before? and the rake deduction is a carry over?
Edit: Also Rakeback Pros is having some problems. From the Rakeback Pros site
NOTE: We are aware that currently your rakeback data is not updating properly. We are working diligently to fix this and hope to have the issue fixed shortly.
Please rest assured, you will receive the correct amount of rakeback, paid each Friday, directly into your Full Tilt Poker