I tried again this week, I took all cards into my hand that were played during the session (Sunday evening), except one. One I deleted straight away as soon as it had been played, it had definitely been dealt at the beginning of the session - and it went straight to the discard. All the others I kept in my hand, one was dealt out that session, the others were older. Now 3 days later, if I try to delete any of them after playing from my hand, they all go to the back of the deck and not the discard. Then I try it again, and now the one that was dealt on Sunday, will go in the discard pile, this time. As a final experiment, I took all the cards currently in the discard out of the pile, played them to the table, then I shuffled the deck and then tried to delete the cards on the table. Now none of them will discard, and they all go to the back of the deck (what's weird is if you delete a few of them, they all go to the back of the deck, and if you pull one out again - say the one that is second to last in the pile, and try to delete it again, it will go back to second to last. Like it remembers it's place in the deck. Honestly I can totally understand your difficulty in trying to replicate it, as even I can't seem to pin it down to anything in particular. Thank you for all your work trying to figure it out, I know it's a weird minor problem. I mean, maybe it's just some weird glitch in just this game. I guess I'm just going to have keep adding them to my hand (is there a hand limit? I'm now up to 8 cards I can't discard) until we reach the end of the deck and then I can just reshuffle everything. Or maybe create a separate page to store them all on until we finish the deck, and then reshuffle.