That's possible, but it would have to have been fabricated by someone in HI and placed in the book to look like a 1961 paper. Following that the officials would have to make xeroxes to stamp, sign and seal and send out. Multiple officials (not sure how many) would look at the piece of paper in the book and determine (rather easily) that it was made recently.
A far more coherent explanation is that there was a paper entered in 1961. The number is ok if the numbering was done alpha for the entire month. There could be any sort of info on it because we have not seen the original. Then xeroxes of that paper were stamped, signed and sent out. The WH scanned one that they recieved then did stuff to it on the computer. We don't know what they did.
There is no birth record for Obama in the bound book. That is why Hawaii hid the book in a locked room.
Every time somebody is adopted there is a new BC created by the HDOH - made to look as if it was that way from the time of the child’s birth - and anybody who looks at the paper BC in the book may be able to tell that it is a new document. There has to be a way to put papers in and out of the books in the case of adoptions, and that same way would be available for this kind of thing.
The BC’s cannot be numbered by BOTH time of birth and alphabetical order. Are you calling Okubo and Verna Lee both liars? If so, on the basis of what evidence?
The point still remains: Onaka wouldn’t verify claims that he admitted were on the BC in question. Either that BC is non-valid, or Onaka violated the law. What evidence do we have that Onaka violated the law?
(Keep in mind that we DO have evidence that somebody in the other part of the office broke the law by falsifying the 1960-64 index so that it included non-valid (and sealed, even!) records).