Really? Can you provide proof?
Alexander Hamilton’s proposal said: “No person shall be eligible to the office of President of the United States unless he be now a Citizen of one of the States, or hereafter be born a Citizen of the United States”
Lynch v. Clarke clearly gives “natural born citizen” status to all people who have citizenship at birth, and that decision has widely been quoted by SCOTUS.
Go here for a lot of “proof”: http://www.freerepublic.com/focus/f-news/2702550/posts
http://www.thepostemail.com/2011/04/10/when-did-the-definition-of-natural-born-citizen-change/