Saint Martin is indeed not a country but overseas collectivity with EU status, since it is considered part of France proper.
people need to think for themselves instead of blindly copying a quizsite, which has set parameters. It is like on a quiz name all capitals, with a caveat that asian capitals are excluded. Just because asian capitals are not accepted on the quiz does not suddenly not make them capitals anymore.
Also, Johns isn't acceptable without St or Saint before it, even though St John is. The only one on the quiz that requires St to be typed. It might discourage people who think they're wrong.