With numbers like yours one would assume you should easily have gotten in to a school, and thus were told you were a shoe-in. However, I have seen people with 4.0+ GPAs (it is possible to have higher than 4.0 in some schools), 40+ on the MCAT, super awesome shadowing and letters, and still fail to get in to school simply because of the interview (I could give graphic details of one case in particular, but will spare you).
It's easy to blow off the interview as not that important, but I can tell you it is just as important as your MCAT score, your undergrad GPA, and your letters of rec. After you have contacted the schools to ask how to improve your application for next cycle, ask a couple of trusted faculty members to do moc interviews with you to help your interview skills. It's not as easy as some think. Coming across as arrogant, inflexible, or unapproachable is a killer to an aspiring applicants package, even when everything else is stellar.