Have you considered the possibility that the Pentagon is intentionally "leaking" this information in order to take some of the steam out of the final report when it is issued?
If there are no repercussions to any of these sources for "leaking," then you can pretty well figure that these stories are dribbling out with the specific authorization of the military.
It occurred to me but if that was their reasons then I have much of an issue with the Pentagon than just the leak because of who they're using as their outlets.