A. Removing the power cell when this glitch has occurred causes it to ' unwind'. (if it has rotated, for example, 780 degrees then it will take 780 degrees of reverse rotation to get back to its starting point.
B. I'm talking about the retracting floors. (The moving pillars haven't shown this problem, but that could be due to the colliders having time to catch up)
C. I had tried to jump on the rotating platform, but I know from some personal experiments that box-colliders can fail if your velocity exceeds their size. The simplest solution i've found is to give the player-character its own velocity-sized box-collider. (EG: when falling at 40 points per frame, this collider goes from the top of the player to 40 points below him/her to detect objects he/she would otherwise 'warp' through.)