Howdy 
When a contact is assigned to a category and that person removes me from their contact list, the contact is automatically moved to the archived contacts, which is the expected behavior. However, the contact remains visible both in the Archived Contacts section and in its custom category with the “Archived” tag. In both locations, the contact continues to display live presence information. As long as the other user has their TeamSpeak client running, both entries show the contact as “online” (green sign), even though the contact relationship no longer exists. I would expect archived contacts that are no longer valid contacts to no longer receive or display presence information.
Regards