When I try to add a 4th Thoughtseize to my sideboard it doesnt allow me to. I had 4 in my mainboard that I tried to drag to my side, which why do you have to put it in your mainboard first? So annoying to navigate. None of them were being added so I restarted my game. Nothing changed. Then I took 3 copies out and put the last in. THAT FINALLY WORKED, but the fourth copy will not transfer. I havent tried on my computer if it works, but it is incredibly frustrating that I have to launch it on my computer to transfer A SINGLE CARD TO MY SIDEBOARD.