i dont have many other golden cards from paladin, but as mentioned i have a lot of paladin cards.
I am not familiar with the duplicate protection. It could be then that it affects all cards the user has, golden or not and the cause why I keep having barely any paladin cards when I open packs, (not just golden).
if this is the case, then it is an intended part of the card generating algorythm. I would not say its rigged if this is the case, just very very sucky for people that only play one class.