There's a 'variant' rule for all energy which you mentioned, and then an 'official' PrC that isn't a variant, but one in it's own right.
I am not thick, and can read what it is you wrote.
However, the fact that an entry used the official PrC Cryokineticist in an optimization contest about Pyrokineticist that has a well-known energy variant rule and didn't mark it well is pretty damn confusing at first blush, wouldn't you say?
All that I say applies only to myself. You author your own actions and choices. I cannot and will not be responsible for you, nor are you for me, regardless of situation or circumstance.