Invoice Hold for Multi Distribution PO Shipment

 Hi -

      Does Invoice Validation Program  just consider the Received Quantity at Shipment level and not at Distribution? The reason i ask is we have a Shipment with Quantity 3 but 2 Distributions with quantity 1 and 2. Quantity 1 was received against distribution with 1 quantity but in AP invoice was matched against distribution with quantity 2. Even thought Invoice was not matched to right distribution it validated and got paid.

  Is there a way we can prevent this from happening?

Thanks...