Expense Report Post Pay audit issue

Hi,

We have setup expense post pay audit process is that, every nth report goes to Post Pay audit. But for some reason, post pay audit approval sent to the same HR supervisor on a randomly. In most cases, it works correctly but for some cases, the post pay audit approval request sent to the same as HR supervisor who already approved the request. So the HR Supervisor thinks, it has been requested twice and rejects it at the post pay audit which causes the system creating automatic cash advance against the expense submitter. This is become frequent issue wanted to