Voucher getting matched even when PO amount is different and 0 tolerance

Hi,

We have setup zero tolerance at Item Category. The system auto-matched the PO and voucher even when the amounts are different.

Does zero tolerance means that any invoice amount is acceptable? Currently our system is accepting any amount on invoice.

I was having the understanding that zero tolerance means that no variation in invoice and PO amount is acceptable.

Please confirm. We are at 9.0

Regards,

Prachi