SALES Billing Document pull in BI 2lis_13_vdhdr

Hello Friends , I am working to reconcile the data in 2LIS_13_VDHDR and Billing table VBRK. I found that all the billing document number from VBRK are pulled except the billing document number WHERE the "Billing Category is R ie Invoice List, We also want Invoice List - billing document number at my client BMW. Since the requirement is to show the Invoice List in the report.

Please suggest if current design of 2LIS_13_VDHDR is correct or we need to contact sap for this. Please help me asap

Thanks

Soniya