First. Bump.
Second, okay this is REALLY wierd. Just yesterday, I've got back control of the volume with the headphones in.....just like that. Like it never even happened. A couple of things I did the night before was access the "SenseMe" app and watched a movie.
HOWEVER, I do sometimes sleep with it in the same bed and sometimes it ends up kind of under me. I think the pressure from being smothered might have cause the problem. I slept with it the same way again and that morning, I put the headphones and the controls. Volumes normal now. Like it popped back into place.
Thanks for your help, but it looks like it fixed itself. (Note to self: stop sleeping with it on you.)