Moving Layers Mess Up Block Collision Detection

[Sambo]

I've created a code which changes the behavior of a block so it hurts the player when he touches the top of it unless he is spinjumping, in which case, it will bounce him upward instead. It works perfectly unless it is on a moving layer. When it's on a moving layer, it often hurts the spinjumping player, then bounces him upward; or it just hurts the player. I can't seem to fix this.