lkfmdc cleared this up a while back. Clear Cloud and Green Cloud are one and the same. Sifu Parrella and his sihingdai had been using the translation "Green Cloud" based on oral transmission from CTS sifu. They only recently found out that the "ching"/"qing" character they had assumed was "green" was actually "clear" - they sound the same in Cantonese (and Mandarin I think).
Clear: 清
Green: 青
I think this is just a case of incomplete revision of his website.