You shouldn't be able to draw cards you don't have, yes. That sounds like a bug, one I don't think I've seen before.
It's not even really drawing cards I don't have. The Princess is just choosing responses that don't match the drawn cards. For an example: the Princess was invited to one of Filbert's lectures. During his lecture, the cards came up and they were all Lustful (as is the rest of the deck). Despite that, the little gem in the text box was blue, the little pop up notification said "a stranger to the river," and the Princess said to herself, "what is he even talking about? This is turning out to be really boring." Despite having a deck filled only with Lustful cards, I have never seen a Lustful response.
the gem that youre talking about (the blue one in the lecture) is the one the game is looking for for a positive response. So because you had no blue cards in your hand, you didnt get a positive response.
This is also why youre not getting any positive responses from your lustful deck... because there isnt a character really yet who is looking for lustful responses.
So for instance if you want to be in the inquisitors good books you need white and black cards in your deck, because all his interactions require those cards.
doe that make sense?
So if the princess picks the right card, she says something the NPC will like, and if she picks the wrong card, she just says a generic "wrong thing," instead of something related to which incorrect card she picked? If that's the case, and if there are no NPCs that want the lustful cards, why do they even exist? It seems there is 0 reason to take them, even from a roleplaying perspective, because she'll never actually say anything lusty from picking one of those cards.