Darkmoon packs duplicating mini-expansion epic

I bought the darkmoon mini-expansion. I then opened regular darkmoon packs. I don’t have all epics, yet it gave me a 3rd mass hysteria - a card from the mini-expansion. It is supposed to not give you excess cards until you have them all for a particular rarity. Is this a bug?

Visual glitch with “Rally!” and “Hysteria” are both actually Rare rarity:

Help by searching first before posting to reduce duplicate issue threads.

Got it, thanks. Is there also a bug about them not counting the mini-expansion for duels requirements? They want 150 darkmoon cards, yet the initial expansion only contains 135 cards.

The mini-expansion cards are supposed to count for the requirements. Are they not?

That is correct. It says I have 7/12 legendaries, but after buying the mini-expansion I have about 13 legendaries when I count my collection.