I had the same problem. I would fix the problem immediately before you go ride again. The boots eventally slipped on me and my stance changed mid-set where I was landing almost straight legged with no duck.
Seperate the screw from the teeth on the Ronix attaching hardware and put a washer or plastic spacer in between. This way the screw will tighten all the way, but not max out on the board (which is what is causing the "jiggle")
Another answer is the put wads of duct tape on the bottom of your boots near the toe, heel, and middle plate so there is a little seperation between the boot and board. This helps elminate heel lift and will attach your boots to your board firmly when you tighten the boot down to the board.