Yeah, could be questionable..definitely confusing. I've found that you can adjust the bell settings so I crank up sensitivity there (and also since I was never a huge user of the bell I realize you have to really pound it with the shaft of the stick on the right or left side of the bell)..
But my probs have also been that I find the ride to be quiet, so I turn up the sensitivity and volume, but then it will randomly trigger huge explosions of ride/crash that can be actually quite deafening.. add to that when I play through Addictive Drums those misfires get even more pronounced. Its really too bad they don't separate out the edge from the bow any better.. maybe increasing the xtalk send and receive on the edge/bow input will help the two piezos from picking up eachother, if that makes any sense at all