I *think* the nov. interview is mostly for instate applicants if i'm not mistaken and mostly for their undergrads/grads. I'm making this assumption because of the people I know who have applied in the past and when they have interviewed. Don't quote me on this though!!! I have been known to be wrong on many occasions, haha.
There have been a few other people on the forum that were at the previous interview dates and they might be able to clarify who was in their group. I don't think many of them were UNC undergrads/grads though. UNC is defn one of my top pics, there is nothing like Carolina 😀 Good luck!