This looks like a known bug. Is there a Bungie post that acknowledges bug with possible fix dates or work arounds? This is a bummer.
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[url]https://www.bungie.net/en/Forums/Post/254285504?sort=0&page=0[/url] BNGHelp has at least acknowledged it on this post and sent the info on to the devs. As I understand only the first two frames in a week would count, but it does seem like there is a bug as well. So if it isn't even tracking your first two correctly, keep an eye on the forums for a possible fix in the future.