If you check admit.org BU is rejecting folks that already have 5-11 interviews (so really strong applicants). Not sure what specifically they are looking for, but clearly it's not what most schools look for.
The whole explanation of the rubric doesn't really help as folks that already received 5-11 interview clearly have lots of clinical, volunteering, grades, underserved community service, etc. So despite what was stated in that video, it's not that cut and dry. They quite possibly cull applicants they suspect will go elsewhere. Just my theory. Admit.org is a small sample size, and you can't get an interview everywhere, but you do have to wonder what BU didn't like about that guy with 11 interviews. Quite a few with 4-7 interviews and 519-524 MCAT scores. Would really be interesting to see know what their thought process was.