Quite a few flag on here are just two colors. Japan, Israel, Greece to name a few. As you say, many flags are missing.
Ah, I see it now, but this is weird. Red and blue are at 60 degree angle, but white is read at 90.I guess it's still the same angle relative to each of axes, but yeah, that's confusing. Thanks for explaining.
Something something french flag should be at the top something something
It's in the middle, sharing with Netherlands.
The joke is that it should be 100% white
And Luxembourg