If the valves rotated and did as described, the bike would gain and lose power constantly. Compression-no compression-compression-no compression,......endlessly. This is not normal. It makes no sense unless there's some physical damage to something. I can kick mine over until the cows come home, it is the same compression every kick. Similarly, riding it there is no pulse of compression coming and going with the rotation of the valves. The description points to an underlying problem which may be the true cause of all the valve bending and camchain jumping, but who knows? One other thing to check. If you have raised the bars, the decomp cable can engage at full steering lock causing you to kick the piston into the valves. Worth checking.