This was a bad episode. The first story has been done before and Muffy was very annoying here. It wasn't awful by any means but it was boring because they've done these kind of conflicts before many times.
The second story was terrible. Arthur doesn't even appear and none of the other main characters do either. It's just the Tibble Twins with D.W. thrown in for a few minutes. This is yet another episode that's been recycled from an older episode but this one was just terrible. Way too boring. An episode without any Arthur or even any of the main cast just doesn't work too often, this is one of those examples. Not good.