I wouldn't worry about it
Then it got narrowed down to Noah and his family.
I doubt it really matters, but I don't really think that one has to assume that adam and eve were the only people god made by the way it was written. I tend to think of it as, they were his favorite pets.
Well, if we take the Bible as to have been meaning to be literally true, then those alien theorist would probably be the closet to being right.
Personally, I think it's like fables...you take real stuff and make a lesson out of it to teach the future generations.
But, what I meant was, the way it's written in the Bible, doesn't actually say, that god didn't make any other people or peoples.
You buy the premise, you buy the bit