It’s a weird but pretty minor thing happened today to me
For some reason my basic cards got doubled (lol?)
https://imgur.com/p97WdJS
Did you try restarting and see if the cards were still doubled? Maybe it’s just a visual glitch that corrects upon launching the game again.
Otherwise I would contact support about this.
I think it’s a client side bug. I’ve had this before but it disappeared after restarting the game.