I see that in the Nordyke long form BC. However, it’s a greater leap from “Negro” to being classified as “African” as a race back in 1961. They could have stuck with a more general classification using the old terms of Caucasoid, Negroid, Mongoloid, and Australoid.
I’ve not taken a position on that one, so I won’t argue the point. Does it seem odd? Yes, but everything surrounding Obama’s life and his documentation is odd.