One is called "Whispers of the Past" (under World/Exploration, 20 pts) and is apparently tied to collecting memory fragments (with the two fragments in the post-campaign Adventures being the most likely culprits). People noticed this bug as far back as launch, but there's seemingly been no movement (or notice, even) from Bungie. https://www.reddit.com/r/raidsecrets/comments/1dgy7qu/pale_heart_secret_triumph_hidden_lore/ The other has no name data attached to it (under Campaign) and I'm assuming is probably hidden for additional story reasons - but maybe it's also bugged? It would be nice to get some clarification on that.