I think the confusion started just after the beginning of the new fiscal year (Oct). This is only what I've heard, so take it as such. When the CNP looked at retention rates and accessions for the new year, it was decided that there were too many people coming in and not enough going out. To fix the problem, they cut a bunch of slots that were previously available and filled by some pro rec's. Unfortunately, that meant that some people who had been pro rec'd and thought they had a slot saw their slot just go away and were not final selected. That was the quick fix and now they just have fewer slots available throughout the year.
Again, that's just what I've heard. From my time in the military and knowledge of personnel issues, it really does seem the most likely too.
Anyway, to answer the question... maybe things are back on track now and it's working like it's supposed to. You don't get a pro rec if there's not a slot.