First, figure out which account is your correct one, then go into C: drive, Profiles, and then delete all of the others. You can also go into the Registry and locate them and delete the keys, but unless you are comfortable in there, I would suggest you stay out. Once you are done, reboot and see if it creates another profile. If it does, backup all of your data, create a temporary profile, delete all of the others and reboot and see what happens. You just may have to go into the registry and delete the keys. the path is:
If you double click each profile, you will see who the owner of the key is. If it is not yours delete it. But like I said, if you are not comfortable, don’t play here and always back up the registry and your data.