3 Way Vendor Bill Match-Why auto approved?

Hi There

I have enabled the 3 way vendor bill match for testing without any adjustments to the workflow.

There has been one vendor quantity difference value set up

The resulting bill was auto approved.

1 Is the quantity discrepancy on the vendor record (1 in this example) suggesting that any quantity that is billed over and above the purchase order original ordered quantity will be flagged for approval routing? e.g. if a quantity of 6 was billed when the original PO had quantity of 5

2 Is there a way to route vendor bills for approval if the quantity billed is greater than the quantity received?