When I first found Alftand, I hadn't really done much in the main questline past the Windcaller Tomb, so I wasn't interested in Blackreach nor did I know about it. I went becase I was looking for an Aethrelium shard. Even though I wasn't even at the ebony loot level I found a dragonbone sheild. Weird. Now I'm level 42 or so and I re-visited with the actual Attunment sphere I looted the same chest in the Cathedral and found dragonbone armor. Why is the loot so messed up in this room?