1) Luxord is one chillass motherfucker. The Organization never really worried about him allying with the traitors, but they also knew that if push came to shove, luxord probably wouldn't ally with them either. he doesn't involve himself all that much, and the one time he lamented about it, it was because of the whole thing about xion. he was more annoyed that he didn't know about her than the organization not telling him about her.

2) in his past life, he was either involved with a court or was in it, where he developed his class.

3) he lost his heart in a gamble.