There's a big problem about my Usergroups Manager -> as I modify a group's permission & settings, click 'Update' -> omg, it didn't update the group but creates a new group with the name same as the group I'm modifying (exaclty 'Administrators')....
As I tried one more time edit the group, it duplicates one more time to a new group with zero members, and after editing number of times...omg, lots of Administrator group with zero members
What I have done wrong
p/s: sorry for poor English