I would guess that for most people, "possible brands" is pretty cut and dry. But I can see how some might interpret this differently. Sorry you were disappointed.

Its always good to check sites like Hotel Deals Revealed and better bidding before booking major priceline hotels. As much I am a fan of PL, I use extra caution whenever I'm booking non-refundable hotels. This might help: Waikiki Priceline Hotel List.