it's not unusual for this to be the case
see: tulpae
all i get when looking that up is stuff about indian and tibetan buddhism
unless im missing the entire point (didnt go to sleep last night lol)
Even a lot of ancient peoples didn't think the earth was flat because you could study how the shadows of celestial objects curved and stuff. I dunno
medieval arabians basically put the world is round idea into in the general public i think (huge citation needed). they almost got the circumference (or something else with size) of the earth correct