Shutter Island Ending discussion

If you have seen shutter island than you probably were confused at the end like me. Here you can post your thoughts on what happened at the end of the movie.

I think that Shutter Island won again and they successfully tracked him, gave him a new partner (who was actually working with shutter island), and convinced him he had been there for 2 years and was insane, or so they thought when he actually just agreed and was going to find a way to get off the island.