If you've done it every week, you'd have definitely done it multiple times already.
Which means that a glitch has held you from the title which sucks ass. The same happened to me in Season of Dawn with a glitch in the Gambit seasonal quest.
The worst part is it seems to be one of those things that Bungie either is slow to notice because it doesn't affect everybody, or doesn't notice at all.
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Hey look! Another glitch!
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They noticed. They started deleting peoples posts.