That article does not provide precedence because it does not give the parents status at time of the birth. If they were naturalized, which I suspect they were, then those Presidents were Natural Born.
Check out Chester B Arthur.
It’s funny how the terms of natural born citizen keep changing. First, it was if you were born in the U.S. or its territories. Then, it had to be if the parents were also citizens. Now, if the parents were immigrants, they had to be naturalized citizens at the time of the person’s birth. The rules keep changing. If that is the case, then why do we need BOs birth certificate? We know his dad was Kenyan and remained in Kenya, so what does it matter which form of BC Obama produces?