Huh....I assumed that you were riding off the trail to the outside, not the inside. (That's what I get for assuming!) If you're riding off the inside, that would point towards oversteering....I think.

I definitely agree with the belly button thing. It allow you to use your hips and core to assist in control of the bike. I still wonder if there's a leaning issue here...too much or not enough...

This is one of the situations where actually seeing what's happening is worth a thousand words.... What do your riding buddies say about this situation?