Excuse me for a sec while I wave away all the smoke from the gears turning in my head right now... Ah, that's better.

I'm betting that this is what's causing my gear issue... The wheel is probably aligned wrong laterally at the hub, rather than along the outer edge by the tire. When installing it, I always look at how the tire tread/rim lines up with the brake pads and the top of the chainstays, not in the forks where the drop-outs are. And I have a bad habit of turning the knob on the QR, instead of the lever.

I really love this forum