Workflow Framework with Dynamic Path

I'm trying to create a Dynamic approval path using an Authorized User List for purchase orders.  My understanding is the Approver User List on the step definition should retrieve all the approvers, then, when the path is set to Dynamic and the Authorized User option is selected, the system should evalute the users provided in the list againt the Authorized User setup. Is this a correct understanding?

I created the Approver User List is defined using a query which correctly retrieves all the users with admin and BU route contols.

SELECT DISTINCT A.ROLEUSER
  FROM PS_RTE_CNTL_RUSER A, PS_RTE_CNTL_RUSER B