Than Ngo (than, than) has two accounts, neither of which has full access to the bugs database. Please merge them and let bugzilla know he's one of us.
Bugzilla currently does not have the ability to remove accounts or disable them. That is a new feature that I am implementing from the mozilla code base but have not done it yet. Until then please just use the than member account when making bug changes and things like that. I have made sure that all package ownerships point to than.