I checked the number of posts and found a difference between the visible number per user and the actual number.
The number appears to be true for my account but is wrong for some accounts."If we ignore posts in Serious discussion/ Ivory Tower / mods"

 - KingScorpio:        number of Posts:  3015      actual number 3047
 - BillyBobZorton:    number of Posts:  3211      actual number 3106
 - Jet Cash:            number of Posts:   4007     actual number 3792
 - Theb:                 number of Posts:   1805     actual number 1771
 - d5000:               number of Posts:   4610     actual number 4509

and more.
check it