Well isn't this a nice little public relations game. Back in May, NFL owners surprisingly learned that 2011 ticket sales were ahead of 2010's pace, despite the lockout. That sounded incredibly fishy to just about everyone, which makes sense, because we're now learning that it isn't true.
When the public learned that ticket sales were ahead of the old pace, they were apparently hearing about some old information. Now that new information has come out, they're hearing otherwise. This might have something to do with the fact that there might not be an NFL season this year. Maybe I'm reaching, but I have a hunch.
More likely than not, the NFL reported some outdated information last month without thinking about it and has now reported the updated information simply because they have updated information to report. However, this could also be an attention-grabbing PR move where they attempt to make it look like the owners aren't making money. I'm really hoping it's the former.