Quote - I guess what I really want to know is if there's a way to set it so I can undo more than one action

Apart from what has been said already, you can use the Poser Memorize and Restore functions fron the Edit menu (there are also keyboard shortcuts for these) to undo more than one thing. Of course for Restore to be of much use, you first need to have Memorized some point to Restore to.

The Pose Dots, are also useful to save the state of the pose of the figure you are working on, just make sure the figure you want to save the pose for is selected then click on an empty Pose Dot. To clear a Dot Alt+LeftClick. The Camera Dots can also be useful.