Hi NetWill
I've had a similar problem to yours. This might be the same as what your getting. Back along I was getting mapped drives being created automatically. I was told to disable Microsoft Find Fast from the start menu and I also found that the targets for any shortcuts pointing to documents on the network where incorrect. I also created a logon script to re-connect all mapped drives when users logged on and that they would all be disconnected when the user logs off.
Eventually this seem to solve my problem, but I found it took a while for it to disappear. Hope this gives you a thought.