How do I set up an approval rule based on a department?

Summary:

I have a department that wants a different approval process for Resignations so I set up the following rule but it isn't working. It is sending it through each rule. Additionally, we use a department tree and I want it to include the top department and I can't get that to work. Any ideas about what I am missing?

Here is the resignation rule I set up.

Here are the conditions.

Here is the expression.

Here is what is actually happening with what I set up. It is taking it through the Resignation Rule AND Sheriff's Office Rule.

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