You act as if they show types out the date at the top of the screen Michael was off the Island for a long time long enough to go through several suicide attempts at least Fact is what we saw was a flashback so from any point between Jack agreeing to be Bens doctor which I think is the last scene short of playing footbal with Tom to the aforementioned destruction of the sub Tom had time to leave be offIsland for a few days then head on back while Michael took the boat Youre trying to make an issue out of nothing