Invoice is more than the PO amount

Hi

Service PO we have created for 1000$ for company code A001, We have done service entry sheet and Goods receipt for value 1000$,

PO has both GR based IV and SR based IV tick active in Invoice tab of the PO.

As per Tolerance limit in Configuration in Logistic invoice verification

company code  A001

Upper limit set 10% ( check limit)and

Lower limit set 10% (Check limit) .

But we have done Invoice for more than 3000$ for above said PO, why system was allow me to create Invoice more than that even though Tolerance limit set.

Thanks

sapman man