Yeah, There got to be some more Deception going on. It would seem the Hydra was attached or closest to the island sawyer was on at the end.

are we to assume that at the S2 Season finale they send hurley back to the camp and then put jack sawyer and kate on the boat and drive them there? wouldnt they have noticed going across water.

and besides... they gave the boat to Michael...

2 Islands would explain why Henry Gale wanted the Sail boat so bad...