Thanks.
What do the Husseein FBI and POTUS/JC, POTUs/IG represent?
Recipients of those reports?
I don't think so, at least not as direct recipients. The represent more "who was in charge at the time."
"Husseein FBI" is the FBI under Barack Obama, with Comey at the helm of the FBI.
"POTUS/JC" is the FBI under Trump, James Comey still at the helm of the FBI.
"POTUs/IG" reflects the FBI being subservient not to the usual chain of command, at least for the purpose of that particular interview that the FBI conducted and documented. Wray is not listed. Rosenstein is not listed. This tells me that the purpose of those particular interviews was to fact find for the upcoming IG report, and not for some other purpose.