Believe me, the fact they are in the print making business, does not mean they will get them right. In the old days blueprints, which not great looking, were direct copies of the original made by shadowing the drawing over the blueprint copy paper. Today, there are so many ways to screw up a print, that it happens even to pro orgs that are in the drawing sales business. Whip out that achitect's rule or something and make sure, on more than one direction.