Naughty Bus (WORK AROUND)

Just mixing down my album and a session I created in X3c (I think, might have been b, i lose track to be fair as there are so many cool updates) but the session has become slightly corrupted in that I have a naughty Bus...This is loading the session into X3e.
 
I'm setting up a couple of busses for parallel compression for the main drum bus and the vocal bus. But the old main Vocal Bus wont see the newly created P.Bus in the drop down menu. 
 
Hmmm, weird I thought.... So I tried to delete the naughty bus and Sonar just hangs.
 
Did a few other things but to no avail (like load the project in safe mode etc, load the project without touching the console and heading straight for delete)
 
My workaround for a naughty bus was first to colour code it in BRIGHT RED but then I noticed the "hide bus" function, I have never had to use this before but thank golly its there.Now I can work merrily away without worrying about it....The session continues. PHEW.
 
All the tracks assigned to the bus could thankfully be re-routed.