On #1, the game was duplicating a card in my hand. I forgot the details, but it was either:
- A card tries to go back to deck, but it stays on the player's hand.
- A card goes back to deck, and the player draws 2 of the same cards.
If I stepped on multiple Penance at one move, my hand grew larger. I remember that I had like 3 cards in my hand at one point, but had 7 to 8 cards after a move. I had like 5 Magna Carta at that point. I also had Wildcard on Penance (red <-> purple and orange <-> purple).
Just to make sure, this started happening after using Rejuvenating Toxicant.