I don't have a link because I discounted this yesterday, but I read some site where they were speculating the leak didn't come from a staffer or justice, but rather a compromise of their internal email system. That would in theory expand the number of people able to access the information since all you would need is physical access to the email network, its jacks/cabling, or a console.

I mention it now because the leaked doc is dated in February. Maybe the doc was accessed before the website was registered. The left could've had this doc for 2 months, saving it as ammo for a much-needed distraction. I believe they certainly knew of its existence longer than a couple of days judging by the actions of their "elites".