This is a long way from being categorically true. If say, there are 2 spots left and the choices are 11-1 Baylor, 11-1 TCU, and 11-2 Georgia Tech, we're never ever getting in. Baylor and TCU snap up both spots all day.
If there are 2 spots, and it's 11-2 Oregon, 11-2 Arizona, and 11-2 Georgia...