This may be way off beam but I remember when dealing with WinNT domains there was a problem with user profiles - sometimes a second profile would be created locally.
For example, a domain user "fred" should have a profile for "fred", but sometimes there would be a profile "fred0001" (or something like that).
This seemed to happen if there was a hiccup when frst logging on to the PC. (Very hazy on this, long time ago whan I was young and NT was bleeding edge).
Check your local profiles to see if this is the case. Also check the "all users" profile (but I think that's only a faint hope).
Whatever it is, I am fairly sure it is a Windows problem not an SME. Seek out someone who has good knowledge of domains and profiles in Windows.
Good luck
Ian