Originally Posted by Arrogant-One
I just added up the Admin CP > Statistics monthly totals again (its midnight in New York). Maybe it just ticked over to include September 30th because the total is now 9412. I agree the correspondence total posts is 629, but again if you subtract 629 from 9412 you arrive at 8783, and the index homepage is showing 8800 posts - congrats by the way Bill, on making OzChess's 8800th post! 
While 8800 is 17 posts more than 8783, it could well mean that the unaccounted for 17 posts belong to today so they won't go into the Admin CP tally until tomorrow.
The math seems to add up, but I also see your point and your math seems to add up as well.
My figures add up exactly, yours dont.
It is quite simple to see that this site does not have 9412 posts but only 8800, which you can confirm by counting all the posts in all the forums.
You will find that your 9412 figure includes posts that were subsequently deleted. From your figures it appears you have around 600 odd deleted posts since your site started.