Quoted from r00DVM:its definitely SW46 messing up because sometimes when the ball is kicked out of the trough to the starting point it'll activate the "Command decision" rather than allowing me to choose between the ~5 initial options OR during play my rank will keep rising randomly and that switch is the same one that kicks controls both of those things.
My subway is DISGUSTING - I swear i thought it was a metal subway until I started reading more about the game and realized they're all plastic. Its also cracked beneath the center hole so I am deciding if I want to replace it completely (another $120?!) or take it off to clean it and attempt a repair of some kind
You can bet your last dollar that most or all the optos are very dirty too, you may also have a gummed-up diverter. I'd suggest you read the owner's thread as Pin_Guy suggested and set out to clean the subway, all optos, and make sure all diverters are clean and move freely. That's a good starting point to working on your other issues. You really do need to put the game in switch tests and see if any one or combination of switches are triggering others, it sounds like they are. Then read up on how to isolate any problems with the switch matrix to the playfield or boards and proceed from there. This all sounds worse than it is but you have lots of great help on this site with intimate knowledge of this game.