Auto Zoom didn't do it; and a full restart (restarting using the restart button to get a complete restart rather than the win 8 soft boots). Shrug. I don't know. I'm sure it won't be there on the next project. If I find the keystroke that's doing it, I'll let you know. Again, alt arrows work to alter scaling, but click drag on the tracks does not. Also, I cannot left click to get the context menu to change the label for the scaling... and this only on the arbitrarily effected tracks.
The tracks with the problem show a range like this
+6
0
-6
-12
-30
... on the 2 tracks that are currently showing this instead of ...
-3
-6
DB
-6
-3
...
I cannot alter the scale measure unit or multiplication of the scale presentation without using the alt arrows method.