What a shame. One of the things I like about using more fabrics than most is you don't have to be so precise about everything. I used to plan extensively and more than once had problems because of bad cuts. I learned it is better to be a half yard too much then 2 inches too short -- or to use more than one fabric.
When I'm figuring out yardage, I base on a 40" width -- and sometimes I barely get that.
It is not always (so much) the cutter's fault, some fabrics are warped and badly folded/wrapped during the manufacturing process. Backs particularly, between the folding on the bolt and everything, I'd really rather they tear instead of cut, that way at least I'd have a straight edge. Really frustrating when you get a back and extra half yard and still not come out usable for that project because the cut/fold slanted one way on one edge and the other way on the other edge.