[Paul M]

There is nothing wrong with it, You just need to understand what it does.

All the columns except "overall" count the actual number of posts in the database by each user over the time period - this includes any hidden/moderated/deleted posts, and any in private forums or forums that don't normally count posts. It is exactly what it says, a count of ALL posts in the given timeframe.

The final "overall" column is simply read from the user table, it is the one shown in a users postbit, it's not a true count and is rarely accurate on older forums - the reason it's done this way is simply because counting all posts in the database would be a seriously slow query on any decent sized forum.