Okay, you've got the original two castaways. Then they discover, or are discovered by, a "tribe" consisting of nothing but white babes (subsequently augmented by one male), all of whom speak perfect English, live in buildings constructed of finished lumber (even their furniture is built of finished lumber), with no offspring or old people anywhere to be seen.
It's supposedly a small island, yet the tribe has been totally unaware of not only the original two castaways, but also the other castaways living on the other side of this supposedly small island. All appear to be doing quite well with no crops being raised, no pigs or cattle being raised, and no local fishing.
Oh, and now the tribe has a token black couple.
Have I missed anything?