I have infact notices that the flight stats figures don't seem to be accurate. There is too much variation in their figures.
I recently took a flight which according to flight stats did not have 1st class but when i boarded it did. Also alot of times it sometimes shows me the flight as overbooked and then a day later as wide open.

Are there any other websites that offer this kind of data? I had tried expert flyer but it needed me to pay before using.