Also alot of achivements are glitching and wont be earned
But some of them take a little more time then others i found out for example when i got on a different account 50 decaps it took 2 days to load the achivement
And also read carefully
50 decaps is something different then 50 decaps in one week
Do what you need for an achivement
Wait at least 24 hours or maybe a little longer
If nothing happens its broken
If you get it then...
You got it