Steve Moddelmog

I have one. It certainly isn't designed to work seamlessly with Sonar, but I haven't had the problems you describe with muting notes and playing only the selected track. Maybe reach out to Nektartech support?

It seems like there were some kind of compatibility issues with NI keyboards not too long ago. Have these been resolved, or am I not remembering correctly?

Not a stupid question, at least to me. I've wondered the same thing.

Try deleting the file TTSSEQ.INI in app data\roaming\cakewalk\cakewalk core. You will then need to recheck the boxes for your MIDI keyboard in Preferences.