Fridge Logic: If the entire mall is closed on Christmas Day, how does Wayne expect to open his store on Christmas Day?
If Caitlin loves shopping so much, why is she always wearing the same clothes?
The animators don't want to deal with different clothing on the characters.
In the UK, why has PopGirl only just now started censoring it when they've aired it uncensored for several years? They've cut out all scenes of onscreen puking and in "Unhappy Anniversary" they cut out every joke about Jonesy's bowl looking like a boob.
Probably due to falling popularity, so they are trying to clean it up an daim it at children instead of teens. Sad, but there is unfortunately little you can do.