Most likely the countertop company would optimize the number of seams based on the layout of the kitchen.

It all falls under doing your due diligance on the front end rather than the hind end. Depends on the type of granite place you chose and how much you paid. You don't get perfect seams on granite with movement without waste. Waste costs someone, and if you didn't pay for extra slabs for a perfect match, there is not a lot that can be done when there is limited material to work with. And this is why some places are cheap. They ''stretch'' the yield because they don't optimize for appearance sake. They optimize for $$ sake.

Did you see their work before you chose them? Did you discuss the seams? Did you visit the site when the templates were laid on the stone to approve the seam layout and match? A quality granite fabricator would have insisted on that. But, quality costs more. Did you shop price or service?