How come it’s sealed and notarized in 1964???
Because that’s when they requested it. If you requested yours tomorrow would it be sealed and notarized the day you were born, or the day you requested it? The seal and signature certify that it is a geniune copy of the real deal.
It has been theorized here that it was requested for the HI attorney handling Stanley Ann’s divorce, which would have been around the date of the birth certificate copy.