If it helps, it appears that the report is not differentiating between customer number and vendor number (or they are somehow confused).
When I try to sort by vendor number (and only put in one specific vendor number), the report pulls up the customer number for our retail store, and maybe a few random vendor numbers are tossed into the report at the end.
When I try to sort by customer number (and put in one specific customer number), the report again pulls up a mix of items for both our retail customer number and vendor numbers. These results are intermixed, not seperated.
If I try to sort by customer number (and put in one specific vendor number), the report will pull up information for a variety of vendor numbers but no customer numbers.