I noticed the other day that it looked like one of the rubber bushings on my camera had pipped out of socket. So I took the camera off of my H and saw there are 2 plastic retainers on 2 of them. Thought I was missing 2 until I looked the parts up. Am I missing something here?? Or is this the normal mount on this camera?? It seems like 2 of them are just kinda floating.