Doug Ross did the internet research and discovered that although Obama's literary agent bio had been repeatedly edited over a 17 year period, it wasn't until a couple months after Obama started his presidential campaign that "Born in Kenya" was changed to "Born in Hawaii". Does this prove the Birthers right? No, but what I think it does prove is that Obama chose to allow "Born in Kenya" to remain in his bio as long as it created some sort of advantage for him. It was changed when it became a potential obstacle.
I think he used Kenya in much the way Elizabeth Warren has tried to use a fictional Cherokee heritage. It makes the person seem more exotic and could even be worth some money in Affirmative Action opportunities.
It's typical resume' enhancement of the variety we saw with Al Gore and his invention of the internet.