Bill-to Party and KNVP

Hi Friends,

I want to display Bill-To party of a sales order that is displayed under Partners tab of VA03. The same Bill-To party I found in KNVP table - KUNN2 field. I am selecting KUNN2 field based on KUNNR, VKORG in sales order and PARVW = 'RE'. But for few sales orders, the KUNN2 field in KNVP and the Bill-To party appearing in Sales order (VA03) are different. Please let me know why there are different values at two places.

Thanks and Regards,

Netrey