When you open the Update Manager (from Start in menu band) and change to Actors on it only the first selected Actor is searched directly. All follwing Actors will be searched out of the Movie titles AND not the Actors are updated with the selected script but the Movies with the last used script. Haven't tested to update the other possibilities (Movies/TV Shows).
In order to achieve what is possible, you have to try the impossible over and over again. Hermann Hesse