Diversity of the Island Population

It is no secret that Dharma will be back in the new season of Lost. Apparently, when the island transports to a certain time it reawakens those who were the islands previous tenants. Well, it is all starting to come together. I believe this can explain people like Richard, the Egyptians, Yellow jumpsuit guy (who I am positive is Kelvin Joe Inman because I could see the rip on his jumpsuit leg) and1970's Dharma Initiative on the island in "present day."

Imagine me air-quoting "present day," I'm using the crash survivors time as present time (even though I believe they are now in the late 70s or early 80s).

So what does this all mean? Well, it means that anyone who dies on the island isn't really dead forever, but possibly out of phase (for lack of better terminology). Second, it may explain the whispers as previous "out of phase" inhabitants being able to witness events, but not really interact.

Thinking points:

Once you are alive on the island you don't die naturally?

1. That wouldn't explain why Ben aged on the island unless point #5 is true.

2. It would explain Black Rock people.

3. The presence of living Black Rock, Ancient Egyptians, etc. would seem to support this though as I don't think the island has been moved so much in a short time (say since Dharma took the island).

4. Unless! Dharma moved the island indiscriminately at some point for scientific research. I still think they used the polar bears to pull the lever which is why they found modern polar bears with modern Dharma tags in the desert during a dig for artifacts.

It would certainly prove to be a reason why the Island (specifically Jacob) would want Dharma wiped out in the purge; Jacob may or may not really speak for the island.

5. Could the island inhabitants be people from past and future movings of the island. Maybe Richard is from a future island move and that is why he doesn't age. Perhaps once he enters his own timeline again he will start aging?