The short answer is, "[T]hey were the result of a registration record taken by the municipal health authority, not a medically verified “Live" birth documented as occurring at a Hawaiian hospital, per an officially defined "vital event" by the U.S. Department of Health, National Vital Statistics Division protocols."
The article goes into great detail.
thank you very much for bringing that to my attention. It is what I suspected all along. None of the birth announcements include WHERE the baby was born as they do in some other announcements, which made it suspect to me along with other things. The interesting part of the article to me is below (I wish ther was a little more detail):
....Did anyone notice the announcements are not in any alphabetic order, or in order of birthdate? This is because, in 1961, birth registration numbers were issued based on the location of the local Vital Records office in which the registration was recorded. The hospital does not assign these numbers, the DOH does. It appears that Obama’s birth was registered in an office not used by any of the birth registrations offices who received birth certification from either Kapi-olani Medical Center, or Queens Medical Center which use two local offices near those facilities,” said Crosby.....
http://thedailypen.blogspot.com/2011/04/final-report-obamas-birth-announcements.html