Employees (Position) is not following the Approval Limits ??

  Dear ALL, 
Hope you all doing well, I received an unexpected Issue. Think to consult with the Community Guru. 

10The Hierarchy route in the following manner as; 

 

Buyer -> Superindented -> Manager -> VP -> CFO -> CEO 

Buyer is the main person who actually creates the PO from the Requisition and sends it for the Approval. As a Result the PO will go to the Single person for the Approval if the amount is below the 10k the PO will to Superintedent , if the amount below the 50k and above the 10k the PO will go the Manager and so.