Your interpretation of the events is shared by some others on this site that I profoundly respect. The one thing it doesn’t explain are the persistent rumors that swirl like the smoke of a prairie fire around Obama and have since Day One. You know the saying; where there’s that much smoke, etc.
Otoh, your explanation checks one critical box. The CCP discovered that the record of foreign arrivals to HI had been removed. Removed, that is, for the week containing Aug. 4, 1961, and only that week.
Your narrative explains that redaction very neatly. Granny Dunham traveled to Canada for the birth of her only daughter’s first child. That would not have been unusual for that day and age. It would also explain how SAD got to Seattle sans knowledge of diaper changing; Maddy had done it up till then.
Of course Obama’s HI narrative could not survive a record of Maddy returning to HI from CA the very wk of Obama’s supposed birth. [Personally I believe he was born in the third wk of July, ‘61. No sane, sentient adult confuses their own B-Day, especially as the big 5-O rolls around. Obama slipped up a couple of yrs ago and mentioned his real B-Day. No other explanation, short of senility.] So the redaction the National Archives, highly illegal though it was, necessarily occurred.
Anyway, I have to run so that’s it for me for the time being. If I didn’t believe the Kenyan narrative, I’d go w Canada. As I said, it does check a highly critical box.
You would laugh too if you had fooled the American public like he has. I’d laugh too.