They do. I'm sure this has been mentioned before, but the producers have a say into who stays and who goes. I think that's why Katherine was offed when she was...remember the green dress she made? Boring but wearable...that was the dog challenge...but yet they kept Keith, who did not complete the challenge as he was supposed to (by not making an outfit for his dog.) Since Keith made for better TV.
I wish they would go to a blind rating...where the models show the garment, but the judges don't know who the designer was. Then the descision is made based only on the scores, and announced w/o the judges ever knowing who designed it. Much more equitable...but never gonna happen!!!