Is there a way to see all episodes available for a particular channel by entering my cable provider?

For example if I load the A&E Plex channel, I only see the first 5 episodes from season 1 of Duck Dynasty. What is the point in loading a Plex Channel if I don't get access to additional content? I would think It would be like going to the A&E website, enter my cable provider, and then having access to all episodes of a particular TV show. Maybe I am not understanding the benefit of loading Plex Channels. Once I watch the limited episodes available, I might as well remove the channel.