Can’t find much about the release date of Black Orpheus - still checking that December 1959 comment. But this much I can tell you, I suspect that chapter in the narrative is nothing but a contrivance to make it appear that Stanley Ann Dunham was enamoured of black men...not just a ‘coloured’ man, but a really really black native african.
Regarding all the photoshopped pictures, there can only be one explanation. The mythical life is even more mythical than most people know. The truth is so far-out there that there is not even a photographic record of a few photos that can support the myth.