"^^ The other kid (batman) on that thread that said he was in ‘the same boat’ and he was waitlisted so it may not mean that much being in the second round of interviews done en masse. "
Actually, that’s a fairly meaningful result. Although it’s only a single result, if it were to turn out that a disproportionate number of these students were waitlisted, it would mean that it’s more likely that being re-interviewed means that you’re “on the bubble” than that Harvard messed up some interviews and had to re-do them.
Of course, the data needed to really figure that out are not available to us, so we can do no more than speculate.