profiles stored in documents and settings

Ok, I have a NT domain with XP Pro users and roaming
profiles. One of my desktop machines writes a
username.domain(number)folder in c:\documents and settins\
every time the user logs on and theres about 30 of them in
there now. For example...
bob.mydomain
bob.mydomain(1)
bob.mydomain(2)
....and so on. It is the only machine that is doing this
to my knowledge. Like I said, no other machines are doing
this, so if anyone could help me figure out what is
causing this, it would be greatly appreciated.