Are you waitlisted at some of those schools? Have you sent them letters of intent with any updates/changes? If you have not, send those stating your continued interest and why your prior accomplishments and experiences make you a good fit for their respective programs. As the above poster stated, it is most likely interview performance. From experience, what i found to be helpful was write down generic answers to about 50-60 most commonly asked interview questions and just go over the answers repeatedly. I wasn't memorizing them, of course. Rather, I just made sure that if i were asked a similar question, I wouldn't blank or freeze during the interview. This also made me appear more confident and confidence is appreciated in interview settings. The cycle is not yet over so dont lose hope. In the event that you need to reapply, definitely sharpen up your interview answers. Best of luck to you, im hoping for the best!