Categories Exclusions not working in customer volume program

Summary:

Requirement: Customer volume program needs to exclude items from the categories selected.

Test case:

We are using a catalog called Brand..with 3 levels ..Brand Catalog >> Brand Category >>Brand >>Item. The item is always assigned to the lowest level..

We used categories from this catalog as qualifiers for the customer volume program/Types and created two programs and imported the sales orders.

PRG1 : Rule --> Added Brand Category as qualifier(so included all brands 6 in total),Prog Type: Cust Volume prog

Ran Import sales order invoices having 6 items belonging to each brand category, it worked correctly and accrued for PRG1