Quick note just wanna be clear I don’t speak for admissions - I’m just a random student so don’t take my word as anything more than that.
Everyone at Miami is placed on the same “master list” after their interview date. Then the top X number of students on the master list are accepted on each acceptance date. So in reality EVERYONE is on the same list. If you dont get accepted on that first acceptance date after your interview, then you'll get an email saying youre on the "wait list"...however this really the same list you were on before. This happens for everyone, regardless of when you interview, and each acceptance date all the newly interviewed students are considered with everyone else - all on an equal footing.
After the last acceptance date, UM will transition to rolling admissions, and take people off the top of the list as spots become available rather than waiting for designated "acceptance dates" (this happens mostly after the AAMC multiple acceptance deadline in late April).
Sorry its so confusing, but the important thing to take away is that UM has a somewhat complicated system that allows students to be considered based on the merit of their app, regardless of when they interview. Unfortunately med schools do admissions on a rolling basis, and theres only so many people we can interview at a time.