The law you cited only deals with someone born abroad. The 14th Amendment governs when someone is born in the US- other than a few exceptions (such as children of diplomats), anyone born within the US is a natural born citizen.
The law you cited was meant to deal with a situation where only one parent was a citizen, but they did not spend any significant time living in the US.
Exactly, and Obama's Mama didn't qualify and his Daddy, whomever that is, didn't either.