Do you have brakes installed on the binding? If so, I'd guess that's the culprit. You might want get rid of the brakes and just use leashes instead. Wildsnow.com has instructions somewhere, it's a pretty easy fix. My experience was that the spring on the brakes had a tendency to pop the binding into ski mode. Super annoying, though it is a handy excuse to stop and let someone else break trail Anyway, once I got rid of the brakes the problem went away.