R12.1.3 - For PR approvals, can you use the seeded "Approval Hierarchy Method" and AME?

Hello All,

We have a requirement to add additional approvers to the Purchase Requisitions  (PR) approval workflow based on the project code.

Currently we are using the seeded "Approval Hierarchy Method" to work out the approvers.

We have created a AME workflow using the "Purchase Requisition Approval" that works out the approver based on the project code.

But it seems you can't use both at the same time?  I just wanted to add the additional AME approver to the existing approval hierarchy?

If I blank the field "Approval Transaction type" the default Hierarchy works, if I blank the fields "Approval Workflow" and "Workflow Start Process" then the AME approval works.