South park animation

Anyone notice a bit of animation from An Elephant Makes Love to a Pig that seems rather primative? It's the scene in which Pip asks the boys whats for lunch. It looks like it came from Cartman Gets an Anal Probe. Also some scenes from Anal Probe (like the "That kinda looks like..tom Selleck" scene) seem more technically advanced than whats in the rest of the episode. Finally did anyone notice that someone's eye overlaps Mr Garrison's shoulder when everyone is changing their bets to Satan in Damien? Mike