I don't see them on Origin either when viewing your profile, it shows 81 achievements total (same as on here it seems). How long has it been since you earned the achievements?
I'll try force scanning the game and see if that picks anything up.
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One last thing. Is there a way not to have to log in with Steam every time I close the browser? (chrome) I always have to enter Steam guard...
Hm, that's odd. You should stay logged in. Do you have cookies disabled or anything?