I got a couple of achievements that I'm pretty sure I didn't fulfill the requirement:
- Have a district be pillaged by 3 different random events - I didn't get a single district pillaged even once when I unlocked it.
- Move a military unit into an enemy tile using a tunnel - There was no Tunnel nearby.
I think some achievements are triggering with any action in the game, regardless of who did it (you or the AI). Was Canada in your game?