Network Layer x Application control Layer problem

[Cipriano]

Dear colleagues, can anyone help me on the network layers and application control! I'm trying to understand why I have to by the same network rules in applicative control. It should read in the network sequence after application, and only takes effect when the rules are in the application. If you look at the image, you will see rule number 3 in the network layer, and the same rule only has effect on rule number 8 of the application layer. If I remove it from the application layer, it stops working. im so confuse about it! they should read network layer and apply the rule no?