Joe,
I don't understand your reference. If you are talking about the front trigger hitting your finger when you fire the back then I don't think the front trigger hits leftys any more that rightys. In fact, less. The right handed shooter has his finger much further locked in behind the front trigger when he pulls the back one.
If your reference is pulling the front trigger and having the back one go off then the trigger is being pulled improperly. A shotgun trigger should always be pulled with the first joint of the trigger finger. Unlike a rifle which uses the pad. A shotgun trigger is slapped, pulled suddenly. The joint has no flesh and no give. This is basic shotgun shooting stuff. If you pull the trigger with the first joint of the finger you can't hit the second trigger very easily. And, the way rear triggers are usually bent slightly to the right really makes this possibility slim.
Anyway, that's how I see it.
Jake


R. Craig Clark
jakearoo(at)cox.net