Magical vortex and look out sir

BRB p. 93 (champions): "The only exceptions to this are attacks that use a template (such as cannons, stone throwers, breath weapons, magical vortexes and so on). Fortunately, in these cases, a champion is so beloved by his unit that ordinary rank and file troops will attempt to save him - as represented by the "Look Out Sir!" rule (see below)."

BRB p. 99 (characters): "The only exceptions to this are shooting attacks that do not use the normal shooting rules, specifically, shooting attacks that use some form of template (such as cannons, stone throwers, breath weapons and so on). If a character is hit by such an attack, and he is in a unit of at least 5 rank-and-file models (excluding the champion, if there is one) and he is of the same troop type as the unit, then his controlling player is permitted to make a "Look Out Sir!" roll to save him from harm."

1) Yes. Originally, the wording for champions was the same as for characters. The new wording is clearer, but they forgot to change the same paragraph in the Look Out Sir! rule for characters, which, however, "works exactly as the "Look Out Sir!" rule described for unit champions" (BRB p. 99). 

) Unless specifically stated otherwise, vortices move "at the end of every subsequent Magic phase" (BRB p. 31), i.e. every player's.