WHEN he signed the contract has little to do with it. He would have made his own negotiations, regardless. (Or someone did on his behalf, before someone jumps on me for a technicality.)
This is no different then when "normal" people accept a new job but already have, for example, vacation plans. When it's agreed upon during the hiring process, there's no problems.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.