Just to be clear, we do not have an Airplanes > Kits category in the marketplace. The categories are broken down by model type such as Aerobatic, Giant, Twin, etc. When an ad is first posted, it is most likely you will see it listed for a short period of time on the first page of the parent Airplanes listing group. Very quickly, new ads get pushed down the page by more recently posted ads. If you would like your ad to stay higher on the parent Airplanes page, you should consider utilizing one the category Featured option in your ad. Keep in mind however that this does not guarantee an ad will always stay on the parent category page. Newer ads posted using the Featured option will still push other Featured ads lower on the page, but the movement will be slower than for non-Featured ads.