AP invoice tolerance by either quantity or total amount

Hi AP Expert,

We are implementing AP invoice matching tolerance feature and it sounds system is not working as expected. Our user is looking for setup a quantity-based invoice tolerance has following conditions

1) Ordered Percentage = 10% or

2)Total Amount =500.

All PO and Invoice are in same USD so no exchange rate amount

I created following case with quantity variance only

PO: 100 unit at price 100 each = 10000

Received: 100 unit at price 100 each = 10000

Invoice matched with quantity 108 X price @100 = 10800 (8% exceed by quantity)

Now the difference is 10800 (invoice amount)-10000 (PO amount) =800

That mean greater that total amount of 500, but < than 10%, so it meet 1nd condition and failed 2nd conditon.