Interesting batch of things to consider! Thank you!

sitting crooked -- I could be doing that. I'll get Earl to watch me ride and see if he can actually pay attention to finding the info that I need! I tried to pay attention to this on today's ride, but do need to have this looked at, since I can't see it for myself!

Seat crooked -- easy to check! and fix if necessary!

One leg longer than the other -- another thing that's possible, I suppose. I wonder how to know?

And left leg down -- how did you know that it's my down leg??? I think somewhere in the depths of my mind I gave that possibility some thought, and tried to work against my natural tendency today, at least a little. It feels so strange to make myself ride right leg down!

Thank you all for the suggestions! I'm eager to give them all a try!

Karen in Boise