Question for anybody that watches the Originals.

I've been DVR'ing the replay of season one (they supposedly show one episode every Thursday in the order they originally aired) We watched the latest two last night but there was a huge gap in the story and I was hoping someone could fill in that gap. The first one was where they complete The Harvest and hot young witch has her throat cut and black witch is revealed to be old dead black witch. The 2nd and supposedly the next episode in order has hot witch back alive, the original vamps trapped in a cemetery fighting each other because of some betrayal, blonde vamp leaves NOLA, and old/young black witch is supposedly dead now. WTF happened in between????