Flint 2 (GL-MT6000 ) - Questions about the firewall

Due to some other issues, I took a closer look in the Firewall configuration of Flint 2.

What I see confuses me a lot.
Let’s take for example the Guest network. I see the following:


Now, I am totally confused because I see that covered networks are Guest and the WAN interfaces!

In my Flint 1, the situation is very different:


The configuration of Flint 1 makes way more sense compared to Flint 2.

My questions:

  1. Which one is the correct?
  2. If Flint 2 configuration is wrong, why is it not fixed yet?