Is any familiar with how TV production codes work? 

Ep. 8 "Red John" is listed as 4X5607, while Ep. 7 "The Great Red Dragon" is 4X5608 - the only 2 episodes that have the codes in wrong order.
http://en.wikipedia.org/wiki/The_Mentalist_(season_6)

Is this a typo mistake by whoever updated the Wiki entry, or does it hint of something else?

I'm delusional and refuse to believe that the producers would write/shoot such a shitty episode. It defies all logic.