Duplicate Drive mappings in windows XP

I have a single user that for some reason has mapped a drive to a location on our file server.

Through out the day that same location will get mapped to different drive letters.

For example:

User maps e:\ to location.
later in the day f:\ also gets mapped to that location, then g:\ until there are about 5 to 10 drive maps of the same location.
This all happens on its own, with no user interaction.

I am hoping someone can help, any ideas?