Expense Report Approvals - HR Supervisor added at all levels

We have noticed an issue with our Expense Report approvals.  We have set up Expense approvals to run with 3 levels of approvals: HR Supervisor, Expense Manager (by account range) and Pre Pay Auditor (by account range).  Pretty straightforward.

I have a user in the system, John.  John is in Finance and is assigned as an approver at Expense Manager and Pre Pay Auditor with at least 2-4 other folks at each of the two approval levels.

Now, if John enters an expense report and submits it to his HR Supervisor, and the HR Supervisor approves it, John's expense report routes to the Expense Manager level, but it ALSO substitutes John, who is in the list at that level, with his HR Supervisor who is not.  So now, John's HR Supervisor is tasked at the Expense Manager level which is incorrect.