Yes, you are missing something.
Allen’s birthplace made him an American AT birth, but he was not a citizen BY birth because his father was a British subject.
IOW, Allen was an American citizen, but he was not a natural born citizen and, therefore, was ineligible to be president.
So where is the legal and constitutional discussion of this person’s theory? All I saw was a blogger claiming that someone else’s claims were lies, and then found out he was born in the US anyway, but decided to make a semantics argument out of all of it. And Mavs are ahead by 15 points.
Who is Allen? Arthur was a natural born citizen.
The article stated Allen's mother was an American citizen.
“Allens birthplace made him an American AT birth, but he was not a citizen BY birth because his father was a British subject.”
Huh? What point are you trying to make with the prepositions?