PeopleSoft Expenses ~ How can I audit my Prepay Auditor?

We would like know if our PrePay Auditor changes the Total Amount of an Expense Report prior to approving it for payment. We have granted them "Full" access for Transaction Lines and "Full" access for Distribution Lines. However, we are unable to determine if they modify the entire monetary amount for an expense report.

Example:

1. Employee Bob submits a 1 line expense report for $100.
2. Bob's supervisor approves the $100 expense report.
3. PrePay Auditor sees that the $100 should have been split into two expense types.  Therefore, Prepay Auditor adds an Expense Line with a different Expense Type and inputs $10.  Prepay Auditor was supposed