When the entity attacks the player it gives potion effect even if player wearing a shield

Hi, im working on a entity that gives weakness and blindness when attacks, it worked very well at first but I noticed that when I (the player) tried to block the attack with a shield, it still gives me potion effects. Then I create a procedure with the  "Entity Blocks With Shield" global trigger, but it seems the "Entity Attacked" trigger always overwrite the shield procedure and then continues to give potion effects to the player... How I suppose to do that? 

Heres a print of my procedure