I don't think that's actually what Clarke is saying now, either. I'd interpret his beef differently than Ty did in that statement.
Also -- the facts cited in the Fox transcript that you linked to seem to be consistent with the facts Clarke sets forth now. (At least those in the first several paragraphs -- all that I read.) The difference seems to lie in his interpretation of those facts -- which I suppose is a legitimate subject for comment.
OTOH, one would expect someone testifying on behalf of the Bush Administration -- as Clarke apparently was in August 2002, to put forward the perspective of the administration. I've been very tangentially involved (an observer actually) in preparing witnesses for testifying before Congress -- and I assure you that they don't wing it. The statements are vetted up and down the ladder.
S_A_M