Expense reports go into pre-pay auditor's queue before it's fully approved by project approvers

Hi there. We've got a production issue for our expense report approval. We are on PS Expenses 9.2 with image 25 fully applied.

Our expense report approval levels are as below:

Level 1: supervisor - header level

Level 2: project manager - line level

Level 3: pre-pay auditor - header level

Since the project approval is on line level and we could have multiple lines with different project managers, we have encountered the situation that only one expense line (out of many) is approved by a project manager. This report is not supposed to be in our pre-pay auditor's queue but it is! In fact, our pre-pay auditors don't want to see the expense reports until they are fully approved by other level of app rovers.