The Stalker achievement (track the same player 3 times) doesn't seem to work properly. I tracked the same player four times in a single game (they were transported N2 so I went after them an extra time), but didn't get the achievement.
N1 track
Spoiler:
N2 track (target was transported that night)
Spoiler:
Transporter (Omona) confirms they transported Sarah Good N2
Spoiler:
N3 Track
Spoiler:
N4 Track
Spoiler:
The transporter (Omona) indicated during the game that the only night on which they targeted Sarah Good was N2.
Edit: Just realized that I didn't get a screenshot of the endgame playerlist, so I can't get it manually granted to my account. Rip.