I had under 100 legendary marks when I started it so it wasn't an issue with the 200 cap. I'm owed 11 3oc because that was my reward from the Nightfall (in post titled: "Where is my loot?" search: #noloot) and it never went into my inventory. in Part 2 of my post, I wasn't given the 15 LM, and as I mentioned in this post (Part 3) again I wasn't given my 15 LM. Hence the 11 3oc and the 30 LM currently owed to me I saved the videos for all of them in case Bungie wants to see them

3oC is a consumable item was your consumables inventory full on your guardian that did the nightfall? Some consumables do not make it to the postmaster. Other possibility very close, or too close to reset on the daily crucible your last 2 crucible matches were clash which I assume was yesterday's daily as today it is Skirmish.