When you click on "Add Addon" (I'm talking about www.myteamspeak.com) and leave the New Addon page without editing anything you will create a empty Addon.
The Addon should not be created until you click "Save" - to prevent empty Addons floating everywhere.
EDIT: Also can anyone tell me how long does it take to get from the "REVIEW" status to puplished? And can I help making the REVIEWing faster?
All the best