User blog comment:Fweepers/What is your Favorite & Least Favorite episodes?/@comment-5762508-20120909190851/@comment-5017229-20120911201355

Maybe those episodes had that kind of anmation because in between episodes the animators drink too much coffee & they start to go crazy & they are in the middle of being crazy & they complete the episode's animation but took very few sprints of animation before it aired, thus changing the animation.