Loose convertible top brackets?
@68gtxman: thanks for that tip! I took out both clamps, cleaned them up and reset that pin (one did better than the other). They now clamp down much stronger. I ran some errands today with it and it never once popped out. Thank you again.
@66Dvert: thank you. I will check those out. I definitely don't have them.
Thanks all. I think the case is closed.