i have a similar problem with my royal guard awarding multiple credits when you get the special via the "C" rollover at the top...

it seems to have to do with how long the ball takes to get through the rollover (which doesn't make a lot of sense to me schematically yet)... if the ball is taking a long time to get through the rollover (the guides are a bit bent "in" on mine, which occasionally slows the ball), it'll knock (and award credits) 2 to 3 times...

i haven't messed too much with it yet... i started to, and got frustrated, and figured i'd set it aside for a rainy day (since that special doesn't get made very often anyway)....

following this topic closely now, i'd like to fix it...

yea, no doubt... it would never be as easy as copying someone else's fix...