I don't think that Sawyer was one of the six. If you think waaaaay back, you'll recall that Sawyer had a kid with that girlfriend that he conned. My guess is that Kate promised to look out for the kid on Sawyer's behalf.

I agree that it was one of the weaker episodes but still not as bad as finding Michael on the freighter. I'm sure that Jack's surgery is leading up to something...probably why he was convinced to get on the helicopter and leave the island and the rest of the Losties behind, which is something that I can't imagine him doing otherwise.

What hit me most in that episode was Claire just walking off into the jungle with Christian and leaving Aaron behind. And then Hurley's comment to Jack that "you're not supposed to raise him". Leading back to previous theories that there is something very special about Aaron.