It's the new 10speed shimano tiagra 4700 front derailleur 50/32 - double chainrings.

The symptoms are that the derailleur shifts fine to the big and small chainrings. However the derailleur doesn't move far enough so the chain rubs on the derailleur cage in gears 1-7 on the small ring.

So the when I'm shifting the derailleur down to small ring I have one extra click in the shifter and when I the click the cable get looser but It doesn't move the derailleur.