It's probably someone within the NSA producing these RECORDINGS and providing them to the media.
My guess is that it was the RECORDINGS sent to the media. The delay in their release was because it took time to transcribe those recordings into text.
IIRC, all non-classified communications are recorded for “records keeping” purposes.
It should be fairly easy to find out who it is that’s leaking these tapes because not everyone has access to them.
To put a stop to them, they need to make an example of one.... Something along the lines of charge, convict, and execute for treason at the most or 50 years hard labor with no parole at the least.
The treason one is for whoever leaked the info about our plans to take out the isis leader that was leaked to the ny times back a month or two ago.