This is all speculation...as I have no insight on these schools but am going off of rumors I heard, but it could be true. Some schools that are not ranked may flat out reject applicants that they know are only applying as a "Safety school"....e.g. I know several people who were offered admission to NU and UIC, but rejected to Rosalind Franklin and Midwestern w/o an interview. I can't foresee someone being qualified to attend Northwestern or UIC, but not be qualified for RF or MW. Unless, of course, there's some random class requirement they have that the others don't, but I don't think that's the case. Sometimes I think schools just don't waste time accepting people they know won't actually attend to make the admissions process easier.
But of course, this is speculation. I am not affiliated with admissions at any PT institution, but this is a theory I've heard floating around these forums and in real life from other students.