Invoice Price Tolerances

Hi Guru's

I am testing on Invocie price tolerances but it seems it is not working as per expectations..  below activities i performed

Invoice price tolerances set at 10%

PO Price 28.49

PO shipment  Qty 100  ( PO Distribution Quantity is 920)

Invoice amount 28.49 * 100 = 2849 * 95% = 2,706.55 

I expect that this invoice should not be on hold as it is under accepted  tolerance

When i matched the invoice and i see there is a Line variance hold ( Invoice header 2706.55 and line amount 2849 (28.49*100)) .. I expect this invoice should not be on hold as it is under accepted tolerance..

Can you please explain how the invoice price tolerance will work and when we can see price tolerance hold will be placed on the invoice