There's evidence[0] of other, possibly currently active, whistleblowers leaking documents from inside NSA. This database includes those leaked documents as well, as it mentions XKEYSCORE, which Snowden has said he did not leak.
[0]https://www.schneier.com/blog/archives/2014/08/the_us_intell...
What was the name of this doc? There is some date incongruity here, unless Ed got his old job back.