Wanted to share the official response from tech support. It essentially is a design limitation, and the fact that I was trying to change the staff at the beginning after I had stuff later on relate...
It could certainly be something corrupted in the file itself, as when I try this in a default document, I don't seem to have the issue, but I also don't have a ton of complex perc layouts etc. in a...
Thanks, yes, that's basically what I've come to at this point as well. Appreciate that suggestion. Can't wait to lay out the final score :O
Thanks, Ted, for your reply. Alas, the reason I posted is that it doesn't work following those exact instructions. I've also been using MIDI maps and layouts since a long time ago (like the late 90...