Doh - I hate to make someone look a twat on the boards but in this case I'm going to have to!! The count at the bottom of the posts relates to the TOTAL number of posts by that member and not an individual post number. You'll find that ALL Peter's posts (all 321) will show that and when he posts again, they'll all show 322!
(HINT - the clue is where it says TOTAL POSTS before the number)
Dyslexia rules, he's on 231, had he been on 321 then I presume he would be ballsed up by now. However in the rush to make someone look a twat the Mod quoted the wrong number. Oops! Just goes to show no-ones perfect not even the Mods. Oh #### i'm gonna pay for that!