DoYouBuzz is the owner of your domain name, chosen when you have a Premium account.
The reason behind this situation is to simplify the set up of the domain name, and in no way to get the ownership in itself. In truth, you still are the only one deciding what happens with your domain name, choosing what your publish status is and how you set up your resume.
If you want to get ownership of your domain name, you just need to ask us. In order to do so, please check this article : Can I get ownership of my domain name ?