I just finished up the major parts of TS3 integration with the web site. Groups in TS3 will now mirror your groups on the boards. As a result all groups have been stripped and any groups added via TS3 will also automatically be stripped.
In order to facilitate this you need to edit your profile and add your unique_id to the field provided. (Instructions are in the description of the field).
The changes will lag at most a minute behind the web site.