Ended up interviewing with them last cycle (I chose another school)
It was a pretty long morning. You will have individual interviews, but I don't recall a group interview. Each interviewer tried to focus on a different aspect of your personality. It was low-stress, and the staff was very friendly. Have questions ready to ask as well! That always helps. There were students from the above class helping with interviews and talking to us as well! It was probably the best interview I attended.
It's weird you didn't get an interview....I have B.S. in Biology and only 2 years of HCE (1 yr EMT, 1 yr MA) + lots of shadowing & 3.8 GPA, but I would think your experience/Masters's trumps my credentials by a lot. Just goes to show that PA admissions is never straightforward!