I have "B" set to its default (For the Browser dock) so I cant really experiment or try to replicate this.
However, you may find Screenset to do a better job at remembering Dock placement, the state of the Bus panel, exc.
Simply set it up as you normally do and save it as a Screenset. After your Screenset is finished, lock it
(using the
SS drop down menu). Then use Screenset #2 for your other Bus state. again, lock that one as well.
This will allow you to still use the "D" shortcut to hide the dock, but it will also give you the expanded options with the state at which the Bus is in when locked in the SS.
If you haven't explored
Screensets your really missing out on one of Sonars best features.