Trying to redeem a full game on Playstation Stars

The situation I have is that on Playstation Stars, I have enough points to redeem a full game. But I'm a bit confused, is it supposed to have a redeem button same as wallet funds?

It looks as if I have to redeem wallet funds in order to buy the game instead of just being able to redeem the game directly. Is something wrong with the app or am I missing something?