This issue is duplicated of 0011233. Please find below how these values are used in Procurement.
This feature request is rejected because the way Openbravo manages quantities for goods receipts and purchase invoice is completely different than for sales.
For procurement Openbravo uses 2 tables:
Here you match the purchase order with goods receipts and sales invoices
Here you match goods receipts with sales invoices
So if you want to know whether a purchase order has been received or invoiced you have to use the table M_Matchpo
In the other hand if you want to know whether a goods receipt has been invoiced or not you have to use the M_Matchinv