Alrighty, I think I know how to solve this. Keep rotating it past 90 degrees, it should naturally want to twist which is when you have the middle finger take over and grip the card. After twisting past 90, the card will align itself in the perfect position for you to grab the card firmly between your index and middle finger. The main problem is that you don't have a secure enough grip, which is resulted by not comfortably/properly grabbing that card in the first place. Try it a few times!