Just another coincidence in a extraordinarily long string of coincidences. Every document, every process, is irregular.
My favorite ‘coincidence’ is how Obama screwed up the date of his own B-Day. Placed it in the third wk of July.
Oh sure, every president has claimed to be born in two different mos at least once. Every single one.
Then there’s Obama claiming HI is in Asia. Ppl tend to miss the significance of this, but think about it. How many POTUSes have had no idea what continent they were born on?
Purely a coincidence, though, that it only happened to Obama. Just, as you said, one of many.