I realize now that this should probably have gone in the "bug reports" section, and I see some other Undo related issues in there. I may have the game number captured because I did a screen cap after we decided to abandon the game because I liked the set of cards we were using, so I can post with that later if it would be helpful. We didn't have Forager, which was mentioned in another post about this sort of bug. I had clicked "autoplay treasures" and then realized that I didn't want the coppers to be played, because I wanted to buy Grand Markets. I clicked undo, and it played out like I said.