Re-rating all movies through the 3-title "haven't seen it" ranking system.

I would like to be able to un-rate a movie. Old School is at the very top of my list and has only gone against two movies at the very beginning of my rating process and I'd like to remove it and re-rate it.

Or, it would be great if you allowed the use of the ranking feature for adding movies from your "haven't seen it" list into your rankings, where you rank a single movie against 3 movies in a row to get it in the general area of where it should be, for any movie at any time. That way, I could fix this problem with Old School as my number one movie all by myself.