Here's a link to the StayPut thread which includes a note about removing the MaximumSize and MinimumSize values from the main page. I'm gonna try this to see if it resolves the issue on my end.
Edit: Removing MaximumSize and MinimumSize from the main page object of the bag files does seams to have helped and at least doesn't cause any new problems, so I'm going to include this tweak with the next rev. I do still have some issues with bags not saving, but I think this is due to the SOE save bug. Nothing appears to be "creeping" after this tweak.