PO Change Tolerances are not working as Expected.

After reading some posts about PO Change tolerances thought I would post results when trying to use them with navigation Purchasing Super User»Setup» Tolerances and routings for change orders. EBS R12.2.9 version

All of the test run to date for quantity, date, unit costs, and PO amount have all automatically approved no matter how much they exceeded the tolerance. This was not my experience in prior positions which required approval for changes that exceeded the tolerance even if the new PO amount was less than the Buyer approval authority.

When I raised an SR I was advised the buyer authority was the deciding factor on additional approvals which I thought why have the PO Tolerances at all then. Reviewing workflow changes to look at PO revision number to try and implement.