If playing with Forts, and the Forts have been rotated at round 4 and 5, and I then Undo, going back to round 3, then the Forts have not been rotated back to what they were.
Thanks for the report, but I cannot recreate the problem. I did as you said, rotated twice, then used undo 2 or 3 turns later to before the first rotation and it showed the Tent on top.