Usually on a board like this, your user info is updated on all posts - so when he posted his first msg back this evening it was 1000 (and all messages on the board that he has posted). Now he has posted 2 more, so they all show up as 1002.
At least I THINK that's the way it works,
Clay
Edit: And now he has posted 2 more, so they all show 1004 (keeping a running total

)