OK - I flew the Carbon Cub to a pancake breakfast this morning and had a chance to play with the autopilot GPS combination after installing the latest GPS software updates.
It worked exactly as it should - followed a flight plan without a hitch.
I think I did everything the same way as before.
Maybe not.
I guess the mystery is solved -- but can I remember what to do next time
I think the autopilot and GPS are playing with me.
Bill