The one-story aspect was just one of the unusual techniques used in this episode. I can't recall another King of Queens episode with an uncomfortable secret that the audience knows will eventually be discovered, though it's a common device in sitcoms. By definition that made the episode uncomfortable to watch, but not a bad kind of uncomfortable. Another unusual choice the writers made was to set up the plot with Doug in a confessional, which led me to believe that the rest of the episode would be set in the time period before Doug's confession. So this episode was actually quite disconcerting, but I appreciate that the writers decided to stir things up.