iExpense Approval for Delegation to Lower job level generates Error

Hi Everyone,

We created iExpense AME rules where the approval was based on combination of job approval authority and 2 post approvers in strict order.  We encounter error now when one of the approvers creates a vacation rule delegating the approval to a lower ranking officer.  The workflow status becomes pending on the approver who created the vacation rule although the lower ranking officer approved the iexpense.  After approval, the workflow does not proceed to the post approver.

Example: 

Approvers are from Level 1>2>3>4 > post approver1 > post approver2

Level4 creates vacation rule delegating his approval to Level3.

Level 3 approves but preparer sees approval still pending with Level4