That's true. But in that same sense, why couldn't DiZ have seen that the 14th would be of service in some way, and recruited her to help her with Roxas, thus explaining how she influenced his actions. Because remember, 358's story overlaps with CoM's so he very well could have asked for her help, or perhaps they got each other's help somehow later on in the game, if they didn't know each other at the beginning.
I'm not saying that such an idea is impossible. My point was that DiZ giving Mickey and Riku the cloaks has no implications towards the 14th.