The photo with the leis has been presented before on FR and even people here who have extensively researched the tiniest details of Obama's life were not sure when it was taken. The implication of your post is that Obama has put out all these fake photos. I do not see any purpose in putting out a fake "mystery photo" with no story behind it.
As for your claim that the Kenyan family photo is a compilation, it is clear that is is just a regular photo and no one is claiming that Obama did not visit Kenya and meet with all these relatives, so there is no reason they could not have gathered for a family photo; indeed, they had every reason to do so.
None of these photos are faked and George H. W. Bush is not the son of Nikola Tesla's assistant either.
The question that does arise is why haven’t any of these people from his elementary and high school years come out with stories about Obama. We have never heard anyone come out and say he was a good friend, or a good team mate or a good student (after all he has been called the smartest President ever)? Apparently through these photos, he has been in company of a lot of people, but why are they all so silent? You would think they would have so many things to say about the Leader of the Free World.