I also have this problem.
Some accounts are added automatically.
First I had installed the 3.4.21 free version. Whenever I updated any account configuration, others accounts appeared automatically.
I have buyed the Pro version and the problem persists, but only blogger accounts are added automatically.
This problem is a shocking bore because I have to deleted all these Blogger accounts again and again.
SNAP: 3.4.21 (Pro)
Wordpress: 4.3 (latest stable)