The first line does not have two errors, it makes perfect sense. Here it is below for others to actually see that everything is fine there.
> From 3AM on Sunday September 11, 2011, until 3AM the following day (US east coast time), WikiLeaks is re-releasing over half a million US national text pager intercepts. The intercepts cover a 24 hour period surrounding the September 11, 2001 attacks in New York and Washington.
It doesn’t say that the original 9/11 incident was on Sunday or in 2011. It says that Wikileaks will be re-releasing their US national text pager intercepts on sunday 9/11 in 2011.