I have Shimano 105 components (with the triple shifter) and a compact crankset. I am having issues adjusting the limit screws so that the FD will shift to the big ring without overshifting and dropping the chain. It seems it either doesn't quite reach, or it overshoots and I have to look at my chain and be careful when I shift. I already moved the FD clamp down a bit on the seat tube, because it was too high per the Park tool instructions. It just seems that to shift up, the FD has to travel too far outward. I've been losing my chain off the outside recently.
I am not sure how to deal with the three clicks of the shifter vs. the two chainrings. Should I tighten the H screw down enough that the shifter effectively has only two positions, i.e. the shifter will not be able to pull the FD out any further than the inner two positions? How is the shifter to chainring number mismatch usually handled?