So i started to see that legendary cards not just only do not have protection for get a copy from a pack, but it just replaced already exists ting legendary card and call its new. An old one copy just disappear. Firstly i thought that i've missed something or forgot my collection, but the thing is - that at the beginning your collection is too small and you have only couple of legendary cards, so it get more obvious when you get dublicate from the pack. You can check my log, for last 2 days i've get 2 legendary cards that was already in my collection, and this is now first time. It was too close in time so i could see it obviously