Wait - are you telling that Contador stole leadership from Armstrong?
Because it's exactly the opposite. Armstrong tried to get rid of Contador. He wasn't the leader of the team. He wasn't the world champion, as opposed to Contador. So he had to help Contador.
(Naturally, the problem also came from Johan Bruyneel, who let this happen)
It was published in Bicycling Magazine that Contador disobeyed team orders on several occasions. The biggest complaint from the rest of the team was his complete lack of respect. He acted as though he was the only member of Astana. Despite this, Lance and the team rode for Contador. If the issue was with Armstrong, then Team RadioShack wouldn't be last year's Team Astana minus Contador.