Yes, you could edit the design file. But, it's easier to do the following:
Within CBC's Design Tab, there is a setting called "Concept Sorting". Choose "Natural Order" and then specify the "brand/product" attribute. If you use the Complete Enumeration or the Shortcut method, and you show as many concepts per screen as there are levels of that first attribute, and if you have no prohibitions in place, then each brand will show just once per task, always in the same position.