They should cut it the way you want it cut. I'm a groomer & I make sure I get all the details. If the customer forgets to mention a certain part of the body, I ask how they want it. I make sure I get what they want head to tail.
*Thor's mommy, why don't you call the grooming shop & complain or ask why this is happening? I would.
*oopsmyhalofello, very good suggestion.