Run the elevator to the top floor and look from the lower floor (if its 2 foors, or middle floor if its 3) and watch the upper and lower pistons on both sides. You might have a bad lower seal casing the elevator to drift. OR possibly the pistons arent bottoming out when on the springs. Remove the springs and either lay in the pit or set a camra up to see if the car stops on the stand. for some reason the pistons need a little more weight to fully resync and might need to shorten the buffer stands.
What happens if you preform a CPU resync? Does it do everything properly?
