Unless your name is on the blank, more then likely you got an already made board picked from their huge conveyor belt inventory that was closest to the dimensions in the model you ordered - CI is notorious for that.
Regardless, if you haven't waxed it yet, give it back to the shop, it's their responsibility to supply the exact board you ordered.
One more reason to order your boards from your local shaper. Local shapers can't pull that kind of crap. And since it's CI, I would definitively bring it back.