Snipeet is not bug-free, as you can see. I just experienced your exact same issue. After a few minutes, it came to me why this issue could come up.
After typing my snippet into the textarea, my session had expired. When I hit save, it actually inserted the entire snippet into the database, but since I wasn't logged in, it had no login_id to relate the snippet to. When you go to view the snippet, it dumps the snippet to the screen, but when it goes to display the author's name, it bombs, because there is no author. Since we aren't in the dev environment, we see no error message, and instead see the results of the presentation without any decoration, up until the point where the error occured (which was when the software tried to display the author's name).
Additionally, the software likely displays results (on the homepage and elsewhere) based on the snippet table joined with the login table. Since this particular snippet I just inserted (and your erroneous one as well) don't have a related login_id (author) due to our browser session timing out when we hit save, the list query simply omits them.