i am sorry,but there are many diffrent theorys about who you are following through the game.The game does not come out and say that cloud and co are following a clone.They think its the real sephiroth,so far as I can tell.You may assume whatever you wish,but because the game was so open to these theorys,im afraid i'd rather a new question be asked then an argument break out.Besides that,evil_cloud already gave us the answer to the other one...so...