Just thought I should expand on this with my own experience and partial fix: a mod called skyUI overhauls this system a bit allowing you to set group-equip itemsets, automatically placing both weapons in your hand, or both spells, even armor for a quick-equip. BUT when wielding two identical weapons for me as long as the weapons were totally base it was fine, if tempered or enchanted even if I rename (I've had issues with matching enchants or differing ones) the favorites list will often fail to recognize the second weapon, I've even had it change the name of the right-hand dagger to match the left hand one just by equipping it, but as this doesn't cause them to stack they cannot be quickly dual wielded, and in the case of skyui's weapon set buttons, it also prevents one of the daggers from being favorited at all. So it cannot be grouped. If anyone knows of a bugfix for this it would me appriciated