The phrase you quote, “shall be considered as natural born Citizens,” is a legal term of art signifying a person who is not a natural born citizen will be considered as a natural born citizen despite not being a natural born citizen. The act was repealed due to defects in the Act which had to be addressed with subsequent legislation. The term of art in law was described by English jurist in the 17th Century and earlier in connection with the problems of determining who was and was not a citizen-subject entitled to inherit Norman-English estates and other properties when having been born outside of England from English/Norman fathers. The phrase is actually proof that the person who acquires U.S. Citizenship is in fact not a natural born U.S. Citizen despite being “considered” as one for purposes of determining U.S. Citizenship at birth.
If they are considered as natural born citizens, where is the exclusion for qualifying for the Presidency?