Here's a few facts. The FD is supposed to cover the full range of travel with 3 clicks, but if everything isn't set perfectly, it may take 4. It works either way. Athena shifters are now the dumbed-down powershift model, that can't make mutiple shifts to smaller cogs with one push of the thumb button. The left shifter also works differently than an ultrashift lever, with more limited function.
All of the Campy groups with ultrashift levers can be finicky if the RD cable friction is excessive. Many users don't recognize the hesitation on shifts to smaller cogs only as a cable friction problem. They loosen the cable tension and all that does is foul up the shifts to larger cogs. You can adjust the cable tension all day and it won't cure a cable friction problem.