Invoices are getting auto-approved

Summary:

Invoices are seem to be approved by Oracle itself.
They do end up at the 2nd approver, but they add a comment and then it goes through automatically without really saying approved at the 2nd approver. It seems to me that they really should give an approval, right? Now when we run a report, it also indicates that these invoices were only approved by 1 person. How is this possible?

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