Are you on subscription?
I really think this sounds like something they should look at.
Go to: http://subscription.autodesk.com/sp/servlet/public/index?siteID=11564774&id=11607975
It might be a bug in the program they need to fix.
(Oh, don't try using Firefox to get there though, apparently A-desk Sub. Cntr doesn't like it)
Please post back if you get any answers on it.
This is mainly just users posting....A-desk employees pass through, but they aren't required to answer all the q's here.