Why have treyarch reset your online stats back to level 1 on CoDWorld at War

A link to forum where a treyarch developer tries to explain hows its a bug in the game.

http://www.callofduty.com/board/viewtopic.php?f=31&t=88206 If you are playing on an Xbox 360 and you glitch too much or went into boot camp they will reset your rank.