No, this show never made it to 101 episodes. This is basically shorthand for "Season 1 Episode '01'." Same for the bottom navigation with "S1E1;" means the same thing.
This is the summary of the episode. I tried not to put all the details into this, just some of the major points. This is to paint a picture in your head in the event you do not have any episodes on hand or you want to decide whether you want to watch the show or not just by reading a long summary..
This includes some trivia about each episode such as cultural references or bits the writers include that make you go "Aaaaah," "Mmmmmm," "Hmmmm," or "What the..."
The "Goof Guide" nitpicks inconsistencies of the episodes. These could be errors in continuity, animation, or just facts that the writers got incorrect.
Several hand-picked quotes (by me) that highlight the episode. This is not the whole script, just lines that I think make the episode memorable.
Now why would I put something like that in my episode guides? One reason is that there is a certain episode which you don't remember the name. You don't have time to tangle through this trivial mumbo-jumbo so you can just jump down to a brief summary at the end of the guide. Another reason is, and I can't say why one would do this, you just want to "thumb" through episode guides very quickly to just get the feel of the sequence of the episodes as you may (or may not) remember them.