If I was in charge of people like Anita, Edward, and Olaf, I'd be documenting EVERYTHING. And I'd make THEM document EVERYTHING, right down to how they feel when they first wake up in the morning. And I'd want to know all about the eighty unaccounted for minutes in Anita's report during which twelve people 'disappeared'/turned up dead/were raped.

They are indeed answerable to someone in the US Marshalls hierarchy. Everyone in law enforcement is answerable to some one. Everyone else needs to document their time spent in the field and there's no real reason why sanctioned vampire hunters shouldn't have reports to file like everyone else.