Windows 2000 Pro created duplicate profile for user

There are a few users who are experiencing changes in their profile.  Their profile name has changed from name to name.domain.  Don't know whether it's due to a Windows Update, but user's have minimal access to do anything.

It appears these users have been assigned a new SID & no longer loads the old profile.

I found this info from another post, but it's not answering the question why this is happening:
I did some research and found that a key had been improperly mapped: HKLM\SOFTWARE\Microsoft\Windows NT\Current Version\ProfileList\<SID>\ProfileImagePath
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GhostModConnect With a Mentor Commented:
Closed, 125 points refunded.

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Justin CollinsIT Support TechnicianCommented:
All you have to do to is
1. rename the new folder to something else, doesn't matter what, and then
2. rename the new folder, to what the old folders name was.
3. then rename the first folder to what the old was.
Say if the profile that you wanted to load was mdmcq5 and then windows created a new folder called mdmcq5.local, you need to rename (mdmcq5 to mdmcq5.local) and (mdmcq5.local to mdmcq5).

PS. Reboot and log in as Administrator, and then do the above
mdmcq5Author Commented:
I know all of that, puter geek, I just wanted to know what was causing the issue.
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Justin CollinsIT Support TechnicianCommented:
You haven't changed the domain name at all?  This happened to my company once, but that was when we upgraded from NTserver to Server 2003.  when we did that the domain name changed.  Did the pc fall off of the domain somehow?
mdmcq5Author Commented:
nope. no name change to the domain...
mdmcq5Author Commented:
basically the user logs on, something has locked their profile and so Windows logs them on with a temp profile (sometimes creating a new profile with .<domain> appended).  

a key had been improperly mapped: HKLM\SOFTWARE\Microsoft\Windows NT\Current Version\ProfileList\<SID>\ProfileImagePath

username.domain profile is created only when the following conditions are true_

-User doen't have enough permission on the original profile.
-If a profile is already exist with same name and user is unable to access original profile for some reasons.
-A profile is being locked by a running process, ex: svchost - creating a duplicate profile.

Microsoft has suggested using the UPHClean.exe to keep anything from locking the profile on log on/off.
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