Probably, that's because the Dunham daughter with the baby was spending most of her time elsewhere. Even though, when filling out official forms asking for an address, she'd naturally give that of her parents' at the time: 6085 Kalanianaole Hwy. That's what I used to do when I was a student type, even if I was only at "my address" a few times a year.
So it would seem she didn’t show up in Hawaii with zero until he was old enough to jump up and down on the beds...probably after the Spring of 1963, when she enrolled at the university.
That would be true. Stanley Ann had returned from her stint at the U of Washington, and little Barry was now old enough to jump up and down on beds.
Of course, the real point is, why did she suddenly take her newborn and split for the U of Washington when both she and its father were students at the U of Hawaii?
Those who make anything of the fact that she didn't spend much time at 6085 are barking up a tree.