Scenes apply to Rooms in Hue. So for each discret Room that you have, unless you delete Scenes they will come across in Alexa discovery. Have four Hue bulbs, one in the bedroom and one in the living room and two in the dining room? The Arctic Aurora scene will show up three times. So will the Savannah Sunset scene, and every other scene.
Simply delete the ones you don't want after discovery is complete. Or leave them, and be able to say "Alexa, turn on Arctic Aurora in Living Room" and then "Alexa, turn on Savannah Sunset in Bedroom".