Group Policy

We are a school and for a basic user I had setup a name and password called LAB Lab requires no password as I wanted it that way Then I changed the GP for users to have a password at least 6 letters or more expires every 90 days Someone tried to use lab with a password over and over again so it became locked out Now when I try to reset LAB with no password it is picking up the at least 6 letters policy ,no repeat passwords although I just removed it from the GP so I could do this are there other places to check for the policy to be effecting usernames
w2000 server sp4 xp pro worksttaions