I'm going to play with the bag windows a bit to see if I can't resolve the stay-put issue. Its a known bug I've posted about several times.
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.
NEVER use any of the following files from an add-on:
eq2ui.xml
eq2ui_inventory.xml
eq2ui_mainhud.xml
The following file may cause problems if replaced by an add-on.
eq2ui_newcharacterscene.xml