PR approval heirarchy

Hi We are using the position hierarchy for the Purchase Requisition hierarchy . Is it allowed that notification be routed for approvals to multiple approvers with the same approval limit even if the requisition amount falls below the limit of 1st approver ? 

 

for eg : we have requestor , approver1 with limit $15k and approver2 $15k

Requestor raised PR for $13k so the notiification goes to approver 1 and once he approves the notification will be closed right ? 

is there any standard functionality that we can use to send the requisition to approver 2 after approval from approver 1? Please suggest.