Furthermore, these bars cannot be assigned to numbers they should represent in any logical way: although there are boards with same number of posts, there are no bars with same length.
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Lol! I think I found out why bars are so strange. Board don't get bars representing aproppriate values, but instead they get bars from the "Most Popular Boards By Activity", which represent totally different values, look at this:
I hope that with this knowledge this issue will be fixed without problems.