Well, the armoury shows you getting all the other masks except Daredevil, so that agrees.
And I still have only the appearances of Long Night and Burned Bridge, even though I most definitely have all 5 masks.
Something is wrong here!
Have you tried Item Restoration?
https://eu.battle.net/support/en/restoration
Can you find any of the masks there?
I just tried and found only the cosmetic items for the two masks for which I have appearances.
I think this must be a bug rather than some kind of problem your side.