What determines the number used in links for categories and forums, especially when forums are imported? http://xenforo.com/community/forums/xenforo-pre-sales-questions.5/ The numbers seem to be somewhat random and are different than the vBulletin numbers. Can these numbers be changed or removed? Also, why is it that some of the forums here (like "announcements" and "bugs") do not have numbers in the forum URL but others do? http://xenforo.com/community/forums/bugs/ Thanks for the insight.