Wow! There are other people that do this too! I am 11 and I have been alphabetizing since I was about 9 but I didn't tell anyone until yesterday. Is there anything else that it can help you with? I also have other weird habits. For example, if the TV volume was on 18/19, I would have to put it up to 20. The same with if it was on 8/9/11/12 but I would have to put it on ten then! However, if it was on 14/16, I wouldn't need to put it on 15/10/20. Weird!