>You yell 'Help! I'm being attacked by a steel-eyed harmentia
>demon!'
>Your shield blocks a steel-eyed harmentia demon's slice.
>A steel-eyed harmentia demon is in perfect health.
>
>His melee attacks was direceted at the archon but spells at me
>I belive.

Looks like his melee attacks are directed at you.

>Bug or by design?

By design.