Hi Pinball G,
Try going to Diagnostics and running through the switch tests, you could have a shorted/dead diode which may trigger 2 switches at once.
print out the switch matrix and run through each and tick it off.
if you find that more than 1 come on at a time I can assist. if all ok try the switch edge test and tune each of the drop target leafs and the stand up leaf also.
