Frontpage Query String Sample IS NOT WORKING !!!

Simply put,

– Created a listing with front page exposure
– Made a Carousel on front page and Selected “Only Frontpage Enhanced Listings
– Saved Changes
– Refreshed Front end
– Carousel Displays listing Cats and SKIPS the Category that the listing with enhanced exposure…

QUESTIONS
– What is the proper Query String if the Sample one does not work? Assuming this is not a glitch
– Someone Provide a Compiled list of query strings that can be a reference so that users do not have to re-ask the same questions.

THANKS! =)