As title states
I don't know if this is common knowledge and/or intended, but it seemed rather odd to me, and maybe somebody else finds this interesting/useful
(also reported in-game)
Regarding Weapon enchantments in connection with dual wield weapons.
Tested on a target dummy in my home
One dw weapon was infused.
when using bow abilites like endless hail and poison arrow, after swapping weapons the weapon enchantment of the dual wield bar procs. so far so good I think that is intended. HOWEVER, only the MAIN HAND enchantment procs from those "swap over" ablities. Depending on which weapon I slot in main/off hand slot I get 100% procs of main and 0% of off-hand.
Regarding Glyph of Weapon Damage enchantment in connection with dual wield weapons.
Tested on a target dummy in my home
My glyph of weapon damage simply does not procc from any weapon ability. Having arrow hail, poison arrow, twin slashes and blade cloak active with a weapon damage glyph on my main hand, and it still never procs. I need to do a light attack to trigger the enchant.