Glitched/Not unlockable achievements

Games Other Halo
1

OK, I’ve been trying to get my last two achievements for the last week now

DON’T TOUCH THAT
Defiant: Prevent the attacking team from touching the flag in a matchmade 1-Flag CTF game.

PAPER BEATS ROCK
Defiant: Assassinate a player that just exited Armor-Lock in a matchmade game.

I’ve now met the requirements three times for the “Don’t touch that” achievement and yet nothing .
Likewise for the “Paper beats rock” achievement and this is becoming increasingly annoying especially with Armor-Locks frost effect.

Can anyone tell me what I’m doing wrong???

2

Both of them need to be obtained on a Defiant map, hence it saying Defiant before the description.

This is only the case for the achievements released with Anniversary.