2h Sword to 1h Sword Bug

I was goofing around with my character when i first started playing ds2. I found this bug out on accident and have used it ever since.

Equip two one-handed weapons(or one-handed weapon and shield). Select a spell as your active method of attack(does not matter what spell).

pick-up one of the weapons/shield and set it into inventory. Pick up a two-handed weapon and place it into the open weapon slot.

Presto.