H80i backplate concerns

I got the Corsair Hydro H80i cpu cooler for a older 1366 socket motherboard. I installed the back plate as the instructions said, then the standoffs. My question or concerns are that there seems to be a lot of play between the standoffs and the backplate. I would have thought that it would at least be snug, but I can jiggle the standoffs/backplate assembly around easily. I have not installed the cooler head to the standoffs as I'm concerned about the movement. Has anyone else noticed or had this problem.