Let me explain. The Circa story is real and accurate as to the FISA court review and memos on how sloppy the FBI has been with procedures for FISA orders and screening and unmasking. There has not been enough protection of privacy or control of the FBI. Some unmasked documents were shared with private parties when they should not have been. The ACLU and a group of liberal Democrats, later joined by a few Republicans and Libertarians have been fighting against this since the Patriot Act was passed. The memos shown in the article are a victory for those seeking to expose how poor the FBI's unmasking procedures are. You can google ACLU FBI and unmasking and you can start reading on this. This means that lawyers for Trump's side need to stay on these issues to the extent they affect the investigation-- they can depose the FBI. This stuff probably affects the leak issue more than the investigation. From what anyone has seen, no illegal unmasking so far (same as evidence of collusion)