Time variance regarding helicopter

So the doctors body washed a shore b/f he was killed on the ship, so the 
island is in the future in that regard. (What if the doctor knew? Could he

have changed history?)

Using that same logic when the copter flew overhead and dropped the
package 
with the phone could that have occurred b/f the copter even took off the 
freighter in freighter time?

So the Losties would be a head of the coming bad guys?

I'm confusing myself now!