Why was "six months" dubbed over Lacey's voice in the episode where they
To sabotage each other's resolutions?
Don't look at me
It could be that the show aired in June so they did it to be accurate but made a joke out of it by making it so obvious.
It's like some shows that have actors obscure their mouths while mentioning current politicians and the like so it can be continually re-dubbed and stay up to date but the lips don't appear out of sync
The simpsons made a joke about this when homer an his friend were talking about how would win the super bowl and kept holding a beer glass in front of their faces