Two identically worded birth notices in two different papers, where every single other birth certificate was worded and formatted exactly the same as Obama's, is an indication that they come from the same source. Obviously a government agency created them and not private individuals.
Since I haven't seen any information about what either notice says, I wouldn't know and won't speculate. Why would a government agency post birth announcements in two different papers?? Usual government practice is to have ONE "paper of record" in which legal notices are published.
Most likely. But notice that they don't say where the birth occurred, nor do they even name the child. Plus someone is making the assumption that the parents are married, since their is no indication of that on the Hawaii Birth Certificate of 1961. Since it was possible to get such certificate for a child not born in Hawaii, the announcements prove nothing. Other than their was certificate filed, but nothing about what was on it beyond father's name, and mother's address.