Cancel ASN from iSupplier portal

Hello,

I wonder has anyone encountered this situaiton.  A receipt transaction was done but we also had a correction transaction which bascially backed the receipt out of it on the same day.  The supplier couldn't go to the iSupplier portal later to cancel the ASN (the error message said the selected shipment notice can not be cancelled as one or more lines have been received or are in the process of being received).  However, we can cancel it through manage shipments function.

I am trying to figure it out if system behavior is different between iSupplier portal and purchaing.  Thanks!