When a new card falls into your deck the card selector bar slides to the right. There needs to be fixed/stationary slots for all 5 cards.
This has happened to me numerous times where I go for the card I want and a new card comes into the deck at the same time I go to swipe the card in that slot but it’s the wrong card because the selector bar moved it one slot over to the right so I put an unentended card into play. I suggest fixed/stationary slots instead of a slider so players don’t get screwed up. Time is of essence and one little mistake like that will cost you the match.