"..So yes...copy and paste works and works well. "
That sure looks like one strange copy and past routine. You say you copy 1 track from RB, then when you paste in Sonar you get 11 tracks? And you say that work "well"?
"Well" is relative. It has always done like this in every version of BB/RB I have ever owned.
The copy and paste routine is straight forward... I highlight just one track but.....
Since I don't use this copy/pasting of midi tracks very much, it's not a big deal.
The bigger point was to show that ...yes, it does work. I have also used the click and drag function and that works too.... I rarely use either in the way I work to create songs.
99% of the time, I'm exporting from RB, one at a time, just the one track file that I have selected.