How can I add more Approver Lists to my Approver List Hierarchy?

Go to http://www.apnacomplex.com/main/dashboard
On the left navigation pane, go to Workflow->Approver List Hierarchies
Click on “Edit this Approver List Hierarchy” icon under the “Action” Column.
In the view that opens, click on “Add more Approver Lists” link at the bottom (just above Update/Cancel buttons)
Choose the Approver Lists by ticking the check boxes and press “Add” button.
Sort the Approver Lists by dragging and dropping.
Enter the threshold amount for each Approver List.
Click on “Update” button.