Since alums play a huge role in conducting interviews, I’m guessing some of them must have had last minute work/scheduling conflicts, leading them to switch around panels/interviews. I had received a call from adcom yesterday morning asking if I would be willing to have my interview conducted today instead of tomorrow, but since I’m travelling in from a different city for the offline interview (Kolkata), I explained that I wouldn’t be in the city by then, but am willing to switch up timeslots for tomorrow. So they’ve said that unless I hear otherwise, mine would continue to be scheduled for the original timeslot itself tomorrow.