%100 not the way the cables are supposed to go. It's not hurting anything, but if you got a new board, it wouldn't just be plug and play. What happens is that the general illumination, being on all the time, gradually overheats the wires that carry the voltage to and from the lights. The plug gets all burny and melty, and then the connection fails. So here they just combined all the wires into two bundles, and then soldered a connection to the board. It works, but it's not correct.

It sounds like your sewer has a switch problem, if the solenoid will fire but it's not behaving correctly. What you need to do is go into test mode, and try and fire the problem solenoids through there. If you hear any noise at all, the problem is in the mechanism or the related switch, and not the solenoid.

It depends how much you feel like soldering for the ppb board. It's really easy to find out what transistor goes with what solenoid (look in the manual on page 29). If you still have trouble or aren't sure, tell me which solenoid it is and I'll tell you which transistor goes with it. Worse to worse, you can always just replace them all. They're cheap 36c transistors. The catch with the ones that run through the PPB is that either the transistor on the ppb is bad, or the one that triggers it on the mpu is bad. And it could be neither - it could be a broken wire! So make sure to check your wire continuity.