If this is one of Ben's "ideas" to get back to the island (arriving on a different wormhole to before he got squirted off the island), then he would have to kill his duplicate, like in the movie "Prestige"...and that's just too creepy, even for LOST -- but maybe that's why Richard doesn't need to remember birthdays, because he keeps killing his extra selves and therefore technically doesn't have a birthday anymore! But then Ben might have to dig up another ancient FDW to do it -- unless like S.R.Hadden in "Contact", the DI secretly built an extra Orchid apparatus on another anomaly and just billed Hanso double on the purchase request forms! OK, now I'm getting too crazy.
A Wiki illustration for a space/time application gave us one visual theory on the critical coordinates, that I also embellished. I'm not sure if I buy into the Moebius space warp anymore, but all that coordinates business is still up in the air until TPTB give us some more "friggin' answers". Although, I can imagine Doc Ray randomly floating in outside of the 305' (as TPTB have mentioned), getting caught in the loop, and slipping around time to acquire his previously cut face, before he washed ashore. But I wonder why his neck didn't go back to before it was cut? Hmmm.