You only have the one episode from June. If you're updating the existing episode that will not put you in the fresh section. You need to post a new episode entirely. So you have one episode, you've probably been in the fresh section once, when you originally made the post.
Additionally, you should put a description of the comic up in the description section so people know what your comic is about. You just have links there, and that's not really helpful for people that don't know if they're interested yet.