Analogue-sequencer

I'm not sure what's going on.

Suddenly the p3 is cycling through parts 9=13 (well, part 1-4). I'm not sure
that I did anything to encourage this behavior. Turning it on and off has no
effect. I'm not sure how to stop this and get it just playing part 9 again.

I tried following the instructions in the manual but I'm getting nowhere. No
matter what I do (tried to change the chain at least from just 9-10, and it
seems to be working, but then the other parts light up again and it cycles
through all of them.)

No clue. Really don't feel like spending the rest of my weekend
troubleshooting and swearing.