They're wrong :D The two things everyone in the list have in common, are that they pick the team, and they choose the tactics. Or are we now going to say that head coaches aren't allowed on the list? A caretaker manager is, until further notice, the ****ing manager!
He's not picking the team...
Dean starts as of the day he, er, started. I'd say John is off the list for now - if he returns, he flies straight up to where he would have been had he not left.