Okay, so here is the scoop.
The admissions people are still working on reading the applications they have received, the lady didn't give me a time frame of when to expect any word, but she made it sound like they were getting close to finishing the ones they have?? Whatever that means, I'm not sure why they have to wait to finish reviewing X amount of applications before sending out secondaries to those they have reviewed.
As far as the interview invite with the secondary, this only happens if the applicant meets specific "criteria." She didn't tell me what those criteria were, but I'm assuming if they really really like you and you have a minimum gpa/mcat, then they send you an interview along with the secondary. That explains why some people on mdapps were given an intervew invite while some werent. Also, maybe its easier to get the interview/secondary when you apply early in the application.
She didn't know the numbers on how many applied and how many were sent secondaries, but she is going to get back to me.