Fixed!
Turns out every time the player exits the shop, any available stamps would run their 'apply to card' code! Now they don't!
In the shop, use Wipe Stamps to clear the unlock from a card in your deck, (locked cards must be unlocked in the main play scene) that allows you to put on one of the other two stamps. Swap, and Wild.
Wild cards (W) work as a connecting card to the nearest, largest straight, if possible.
Swap (Circle of arrows) allows you to Click on that card, and then another card +2/-2 from its location to move it around your hand. Use this to reorder cards and set up straights.
As for 13 v 8 Wipe Stamps...not sure? stamps are consumed on use so maybe you've used 5? Otherwise that might be a bug.
I've updated a couple things --- such as reformatting the file, and building the apworld from the launcher instead of by zip --- and it works on my end without issue. The game even shows up in the generate logs at world version 1.0.0 like its supposed to so I think I fixed it? Lemme know if it's alright on your end!