^
^ Well, we don't know what is meant by the word "move" as of yet. Like I already said, I don't the island most likely is not going to be physically moved.
Spoiler Below I forget the exact year, but in the episode The Constant, we see Widmore at an auction in which the journal of the Black Rock was being auctioned off, this is the same ship that crashed on the island...only thing is, at the auction it was said that it crashed in the 1700s if I'm not mistaken. I was extremely confused at first, but in light of recent plot developments I'm inclined to think that there is some sort of uber-time traveling going on here, and Ben probably had to have done this Orchid thing at least once before in the past...this could also be the reason Rousseau's team got "sick". Just my thoughts, though.