Good comments by all so far... I think that there are multiple reasons for these issues happening. To me, the most horrid of the issues with TV shows is "cut" episodes from syndication. I don't know much about the Carsey/Werner company, but the seem to be the offender du jour. I wonder...
It is nice of them to check this out, but the studios themselves are ultimately culpable for the sets that they produce. The reason that you are seeing these problems is that studios, producers and stars are anxious to get this programming out on the market. There is a reason Best Buy...