My first impression was right on the money and I wasn't alone in sensing this guy was off in some way. Now we see he is an angry guy who stirs the pot. There is a lot going on under the surface here. Emily is not interested and senses the same thing.
He remains because she already knows her final 4 and the choice is up to production. Anyone here who is in the background and not contributing to the drama is toast until we get down to her favorites and the trouble makers. Doug is in the trouble maker catagory.
She has good intuition and as she said, she knows more of what to look for having had experience with Brad.