how come org. XIII only decided to recruit thirteen nobodys(well fourteen including xion) when they could had have way more seeing that castle is humongous

Only 13 Nobodies kept their body's when they became nobodies. If there where anymore like them they would recruit them.

oh makes since

yeah, apparently they never got their name officially until roxas joined, and since xion wasnt a real nobody, it didnt change

yea but rember it has to be elite squad and demyx cant keep track there were more

It's not like strong hearted people like the apprentices were becoming Heartless left and right. Nobodies are born when strong hearted people become Heartless, and even then, very few are powerful enough to retain a human form.

Ok I know that each member of Org 13 had a somebody at one time but, who are the somebodies of Marluxia, Luxord, Demyx, and Larxene. They haven't came up with a name for their somebody. So how did these 4 get into Org 13.

To discuss what their old names may have been, you can do that here: http://kh13.com/mybb/showthread.php?tid=859

And well, I think they would have had the opportunities to recruit more members if they found others, but I'm not sure how they all gathered in the first place, besides some of them being apprentices and all.

i think that if they found more, they would have recruited them, but they definitely were trying to make more

 

ex. xaldin trying to make beast a heartless, so they could also use his nobody

 

same for jafar