Another question on confusion. Does the humanoid only do damage to another encounter if it fails the save or does the save only stop his attack?
The idea behind Confusion is that the encounter it gets played on (i.e. a Humanoid Monster) gets confused if it fails its Save, instead of attacking a character it attacks another encounter (i.e. another Monster) instead.
So, yes. The humanoid only does damage to another encounter if it fails the save. The same failed save means it doesn't attack a character.