On swap sigils don't work if you have the same sigil on both weapon sets when one sigil is legendary. Example:1st set Greatsword (legendary weapon), superior sigil of energy2nd setStaff (exotic weapon), legendary sigil -> sigil of energySwapping weapons while in combat don't give you endurance. If you replace the legenday sigils on the staff with a superior sigil of energy it works.I have tested in www with energy, hydromancy and agility sigils. I'm not sure if other kinds of sigil are affected.