You really shouldn't post a game under "consoles" especially when you include pictures of the console in your listing, it gives people the wrong idea... because I am assuming you are not including the DS in this listing but others might think you are.
Dont worry about it. If people think your selling the actual ds when its not in the title or descripton that this is for a game & ds they have to be pretty stupid. You state It works and Include pics of game play that makes It obvious that you are only showing the game on the ds to show it works not selling your ds. Its a simple mistake to put it in the wrong category. It happens more often then people want to think, even hitting the wrong one and not notocenit can happen even to a veteran seller. Great auction and wish you luck in your future listia sales.