When students log out of machines their user profile is not being removed upon log out and this clutters the devices with a large number of user folders.

Eventually no one can log into these devices for an unknown reason.

Novell Login is successful but then it prompts for a local Workstation only login. This confuses students as they try to log on again but of course it would fail to log them on locally.

1.) Why are profiles not deleting upon logout?
2.) Why does this prevent future logins to fail?