A character may use a Free Action to attack multiple targets
in a single action (see Multiple Attacks, p. 196) by
splitting their dice pool. This action must be combined
with a Fire Weapon Action, Throw Weapon Action, Melee
Attack Action, Reckless Spellcasting, or Cast Spell Action.
RAW, multiple targets....
Is this RAI...beats me, I don't personally know the guy who wrote it.
So to do a multiple attack action and attack the same target would need your GM's approval as it isn't in the rules.
BTW, if I was GMing, I'd allow it but conversely, if I was playing and the GM said no, I'd be fine with that too.