Just changed the timing belt on my bros 95 1.8 impreza and its vibrating a good deal and seems to idle kind of rough. I also noticed that after running it for a few seconds and you go back and look at the timing marks on the belt, the belt timing marks have moved which idk if that is normal or not. In order to get the passenger side mark on the belt to line up with the pulleys and the block i have to rotate the cam pulley clockwise and then hook the belt on and bring it back again. any help?