Oh wow that's actually hilarious.
I'm gonna check how that even happened, because it should just match the flag by country code, so I am reeally curious how these 2 countries specifically got their flags mixed up.
Edit: Looks like it's all my fault ;P
The countries where in the list by their official name (Korea (the Democratic People's Republic of) / Korea (the Republic of)) instead of North/South Korea so the mess up was all mine :)