Your information makes sense except that it is only the one hospital. Obama's birth certificate was processed by the state registrar on 08 Aug., Tuesday and he was born on 04 Aug. the Friday before and the other was processed on 11 Aug., a Friday, and they were born on Aug. 05, Saturday, with a lower number. I don't see that any one hospital needed more than one small stack of birth certificates at a time. Probably not much of an issue there, but still seems a bit strange. My real issue is that on 04 Aug, 1961, a Friday, Obama is born and the very next day, a Saturday, at the exact same hospital, the others are born but a bit over 8 miles from where it was the day before. That might take a bit longer to find an explanation for.