From page 45 of the main rulebook:
In addition to the above, a unit that fired in the Shooting phase can only charge the unit that it targeted during that turn's Shooting phase.
Even if you can hit two or more units with the template, you only target a single unit (special rules may affect this).
For your second question, please see 'Armour Save' on page 8 of the main rulebook where they state that an Armour Save may never be better than a 2+.