The FBI is investigating the Clinton emails from the State Department because of a Freedom of Information Act request. The FBI is the only third party other than the CIA that could handle the request. It has not been determined if the entire Freedom of Information Request has been completed to the extent requested without compromising USA national security. 

She is correct. The retroactive classification is problematic and probably not needed. She wants the emails released as much as the FBI would like them to be as well.