This is my understanding of the social security number usage.
John Paul Ludwig (Lived In CT-Died In Hawaii)
According to CDR Kerchner, that the SSN 042-68-4425 Obama uses once belonged to a Sean Paul Ludwig who was born in 1890.
1976-1977 the SS# was issue to Sean Paul Ludwig.
Sean Paul Ludwig dies in Hawaii in June 1981.
Grandma has access to SS#’s of the deceased.
Obama visited Pakistan in 1981.
He returns to New York and starts using the stolen SS# in 1981.
In 1980 Obama did not register for the selective service.
Years later when he is running for President he needs to have those Selective Service forms filled out so he supplies the the stolen SS# he’s been using for years to put on the forged selective service documents.