Nations flags have changed ?

[Servancour]

Flags have a tendency to end up in the wrong order whenever updates to landed_titles.txt are made. Deleting your flag cache usually solves the issue.

To delete the cache, do the following:
> Go go the Crusader Kings II folder in documents: Documents\Paradox Interactive\Crusader Kings II
> Delete the folder named "gfx"
> Start the game and the flags should be generated again

 

[Servancour]

Hmm. That's odd. Start with verifying your files in Steam, and see if that works.
> Right-click Crusader Kings II in Steam
> Properties
> Local Files
> Verify integrity of game files