For some reason, every time an enemy is hit with it, from NPC to giant to dragon, they stagger, even if it's not a direct hit. Note that I have both Augmented Shock ranks and the Impact perk, but this staggering does not apply to my staff of Fireball, even on direct hits (and Fireball is the same tier spell as Chain Lightning, but does more damage).
Also note that, even with the Impact perk, Destruction spells can only stagger with direct hits. That means that Chain Lightning should never be able to stagger enemies within the AOE, only the foe that is hit--and, sure enough, personally casting Chain Lightning has the normal effect. With my staff, I can stagger several enemies at once.
Does this happen to anyone else, with any staff?

