ODST Service Record Not Showing Up

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*Original post. Click at your own discretion.

I have not been getting proper campaign achievements, nor H2A achievements, but instead of answering these issues, I was directed to the pinned topic on Achievements. It told me to look at my Service Record. In my Service Record, it says I have not played the last ODST mission despite beating it twice. What is going to be done to rectify this? There was no clear solution in the pinned Achievement thread before you lock and ban me for posting this.