Thanks a lot for your detailed help!
It appears that my problem is, that buses don't appear in the track view for me. They have never done so in all the time I have used Cakewalk and Sonar before it.
Lenses is set to None, and the track control manager is set to All.
But while writing this, I just found that small button at the bottom of the track list, called "Show/Hide Bus Pane, " and when I clicked on that, the buses appeared at the bottom of the track list, for the first time ever for me... I'm blind or stupid, or both