Solved! I went to Cakewalk Help and checked under "hidden." Nothing, but under "Tracks" I saw "hide tracks." So I figured that somehow the track had gotten hidden. I pressed M on keyboard as instructed, and up came track manager. Sure enough, the phantom track was there, but it's box was unchecked. So I checked it, and voila! Not sure how it got hidden, but in any case it's solved. This was really puzzling. I did all the suggestions, such as muting, soloing etc. As a bonus, I now know why the violins were so loud, and nothing I could would tone them down. There were two identical tracks playing!

Glad you got it sorted
 
Glad you got it sorted
 
Glad you got it sorted
 
Glad you got it sorted
 
Glad you got it sorted
 
(Just pre-empting the forum software )

I had opened a project in X1 last year for grins. Messed with a couple of things, and saved to a new name.
 
A month later I opened the project in 8.5.3 and could not figger why the track and bus volumes were weird.
 
ALL the envelopes were hidden. Was way confused. Drank more beer, and ruminated, and finally opened a previous version of the project and all was happy.
 
 And drank more beer.