Hmm... That is very strange. Beyond that help page, I have no idea how you would unlink from an MCN or why you would be with a network you never signed up with.
I just checked out four of your videos: Hitman, Decksplash, The Long Dark, and Rocket League. Rocket League was the only one that says "BPM Digital", the others say "none". Maybe it's an error from VidIQ, or maybe the MCN is claiming your content is theirs?
If you go into the settings of that specific video is there any information about the network?