I have configured Approvers so that at least 1 of my agents can Approve the request. I want to point out that I don't want the customers to choose an approver, as they are pre-defined.

I also added default Agents under custom field Approvers:

And my workflow where i add Approvers:

The problem is, I tried changing the list of approvers multiple times, but each time a request is open, once again, i see the old list of approvers. I then have to go in manually to every request and change the approvers by removing and adding new ones. As you can see in this screenshot:

What am i missing??
Thanks!