Try without the superfeet. Those are thicker than the stock insoles and raise your foot up, which can cause this problem. Superfeet are not much better than stock inserts if they aren't the right shape for your boots and feet.
I have had 3 pairs of ions, and I have the same issue if I over tighten the bottom. As others have said, try leaving the bottom loose, and put the j-bars in to hold your heel tighter.