I guess I could adjust the stand clamp to a stronger position. I usually run it fairly loose. I can't believe this happened! It seems like just a few months ago that I removed the post and frame-savered the seattube....so, I'm thinking that it just needs a good solid twist...I don't want to wreck the post (thudbuster), but will if I have to in order to save the frame.
I got out of the habit of greasing seatposts years ago when I had trouble with a slippy USE post....
I do have a new bike coming but I'm losing sleep over this until it's done!