I disagree about the "sensitivity" - this sounds like a setup problem.

Dont trust your bike shop to fix it. Check SRAM's YouTube channel - www.YouTube.com/sramtech , and watch the video on Road Derailleurs.

Loosen the FD cable.
Check the FD height (a few mm over the big chainrings) and the alignment (parallel with the small chainring when the cable is off)
Check the limit screws.
Do you have a FD barrel adjuster? If so, turn it just about all the way in, then attach the cable (I pull it to have it start with tension). Then add tension as necessary.

If you don't have a FD barrel adjuster, I'll post more details.