I would have to agree, I do not understand it. They kept saying 2% disappeared, and yet there seemed to be too many in the town to be only 2%. If the average family is 4 (although I believe less now), only one person per 12-13 families should have vanished.
Looks like the central focus will be on the Police Chief's family. He and his daughter at home, his wife in the local cult and the son doing the strange thing out west, probably another cult.
I will try another couple episodes to see if anything develops. It needs something to start happening other than watching a lot of broken people trying to cope with a few people that vanished years ago.