Help! Commendations broken for me

I have beat the whole campaign yet in my commendations it says I have only killed 3 grunts? I’m trying to get the soldier slayer commendation so I can get the reclaimer emblem but it won’t go up anymore. I’m stuck at 4/20 on the second level of the commendation. I hopped on the first level and played through killing as many soldiers as I could and finished the level yet the commendation bar has not moved! Has this happened to anyone else? How can I fix it?

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> I have beat the whole campaign yet in my commendations it says I have only killed 3 grunts? I’m trying to get the soldier slayer commendation so I can get the reclaimer emblem but it won’t go up anymore. I’m stuck at 4/20 on the second level of the commendation. I hopped on the first level and played through killing as many soldiers as I could and finished the level yet the commendation bar has not moved! Has this happened to anyone else? How can I fix it?

I believe that the commendation system ties in with arena/warzone. Dont take it from me, but that is what i believe the system is based on.

ps: 4/20 blaze it

Only arena and warzone counts towards enemy commendations.

Anyone have an estimate or exact number of soldiers to kill to complete the commendation?

http://halotracker.com/h5/db/commendations/0aec742d-d638-49a7-8322-e3c78f5b3770

this should help