You know, I bet the island HAS been moved before. Ben knew an awful lot about it. Oooh, maybe Widmore has moved it?

Widmore! I had a theory about him yesterday. Maybe he's been on the island before also and had the same status as Ben had or maybe was his rival or something. If he maybe moved the island, he could've been the "Ben" before Ben and had to leave because he turned the wheel.