OK...Please disregard my earlier statements about what I was seeing with the scope. I was not using it properly.
Now that I am, I can see what I think Bob was talking about. With the scope attached to TP2, I can see traces moving when I move the front panel controls that are causing the problems. I also see the patterns changing when Bank and Program buttons are pushed, as well as these patterns changing as I move the front panel controls, and at the same time can hear/see the machine lose it's patch, and the pattern changes.
However, patches do seem to repeat the same pattern, when they are pressed, even if that pattern produces no sound.
I will spend some time today looking more closely at Bob's images and text, and see what I can figure out.