Adjusting front mech for double chainring
I need some advice about adjusting my front mech on my road bike. I have a double chainring but my front mech has a three click motion - i suppose to allow it to work with a triple chainring. Do how do i set it up correctly to work on a double? It currently is fine in the smallest ring but the next click takes it to the big ring but ir catches ateeny bit when on certain rings at the rear, if I then click up it if fine again on some of the rear ring but catches on the front mech on others. My question really is can i just set it to do two clicks? or can i adjust my second click to sit spot on for my large front chainring - then make sure that if i do happen to click it agin it won't fly off the front chainring. what's the best method for cracking this double chainring/front mech issue?