Cube bug? Sorc Shield + life/mana pot

[webwalker]

How it is: Cube a sorc shield and life or mana pot, you get a magic/magicethereal shield.Should be: no change, no transmuteThis is because there are no superior/superiorethereal sorc shields.  Same logic as why cubing jewelry and life/mana pot does nothing.
Also, the magic shield generated has strange attributes like+451 damage taken goes to manawhen damage taken goes to mana should be a percentage of damage taken, not a number.