New episode?

I don't understand, the other day I was looking in my WOW OnDemand and I watched an episode where Stan feels unfulfilled with his life, so Avery helps him become a guard dog; in which he just stands on the living room table for days upon days with no sleep, because he wants to take it seriously. But now there's this new episode coming out in a few days where Stan becomes a guard dog because the kids don't want their parents to hook up a security system and potentially expose the fact that Stan talks. The weird thing is that I can't find anything about the OnDemand episode anywhere... and on top of that, it seems that they're using footage from that particular episode in this new episode. So, what gives? Did they decide to re-shoot the episode or something?