Some forums were set up without much thought to where they belonged at the start.  My recollection is that Training was established years before the competition group.

Reloading was an original forum here and lived under the General category for years - past 2009.  When it was moved to the Armory I lost articles and photos and much of it could not be recovered because it was on a server that simply disappeared.  Recovery sucked, and changes in the editor for those articles made the work a thousand times more work.