Seems like there is a little cut and paste problem with the Everlast online welding calculator. It is giving AC balance in Miller percentages instead of Everlast.

Code:
Inverter Squarewave machines typically perform best with 2% ceriated (orange band) tungsten. Other tungsten will work.
With proper parameter settings (balance 70% or greater, frequency 100hz or greater) orange tungsten will allow you to weld aluminum with pointed tungsten.
- See more at: http://www.everlastgenerators.com/tig-welding-calculator.php