How Long Before the Lumpiness Behind the Scar Line Goes Down?

It is normal to feel a healing ridge along the incision in the few weeks following surgery. If you feel lumps along this ridge it is most likely the individual sutures. Your body is just healing and it will soften up with time, and as the sutures dissolve.

Being that you are only two weeks out from your surgery, I would give it a few months for things to settle down. The internal stitches take a while to dissolve and should get better in a few months.  If it is a problem then speak with your surgeon.