9/21/2012 8:01:56 PM PermalinkI don't know about the challenge as I haven't been on Reach in a while but I do know this: This type of thread should belong in the Halo: Reach forum and the Bungie no longer store or update our stats. I thought it was common knowledge that 343i were in complete control of our stats now. Guess I was wrong.
9/21/2012 7:59:13 PM PermalinkIf you quit the game or were disconnected for any reason it's most likely it won't have counted, or counted properly.
For best results in downloading the Destiny Beta to your Xbox One, don't launch the game until the download is complete. The Destiny Beta FAQ has been updated with info on how to troubleshoot your Xbox One download (scroll down). http://www.bungie.net/en/View/Bungie/DestinyBetaFAQ
If encountering Party Stabilization errors on Xbox One: try turning off your console, fully unplugging, then plugging in and trying again.