There's nothing wrong with calling the program coordinator, and asking them to look into it for you. Sometimes interviews do get misplaced.. can't hurt.
IF they say they weren't interested.. I wouldn't be too offended. They just didn't think you were a good fit. I honestly would NOT get pissed about that at all. If you rotated, and they are not giving you an interview for a reason, they are doing you a favor. Why you ask? Because, they're 1. not giving you false hope, and 2. they are freeing up an interview spot for you to fill up with an interview. I would be very thankful for this. I'm sure you had a few interviews on the same day..now you can take advantage.
Don't be discouraged..try.. and if they're not into you.. there are other fish in the sea
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They could have not liked you because some resident was not having a good day, and got a bad impression of you.. that's just generally how it goes.
Good luck
iliiz.