Ignore Participant Rule not working

There is business requirement that already 2 level of approver there, if invoice amount is more than USD 50000 and at there are 8 purchasing categories (invoice line DFF) satisfies should go to level 3 approver (CFO).

Case 1: Invoice Amount: 85k CAD and Line 1 DFF PO Category: Agent Fees" Approval Notification should be sent to level 3 approver - This case is working fine

Case2: Invoice Amount: 20k CAD and Line 1 DFF PO Category: Agent Fees" Approval Notification should not sent to level 3 approver (it means should go till level2 approver only) - This case is not working.

For case 2 we have defined ignore Participant rule (Rule2) this is not working.