So the OFFICIAL RULE (PINNED ON THE ANN SECTION) is less "powerful" then "UNofficial thread" on the meta section? IMHO This is a gigantic paradox.
NO!
They are the same or very little different. Unofficial means rules on the forum can be changed whenever the community ask for or the admin feels that he has to change something to keep the forum works fine. Like what we have in the past 3 years: the merit system (improved later to demote old-era Junior members); the trust feedback system (upgraded 2 times); the bump score, ie.