To attach images, go to Advanced mode and use either the paperclip icon or the Manage Attachments button. It will keep the admins happier if you do not have overly large images inline.
The title in the calibre library must match the title in the book metadata. You may want to look at the
Embed Comic Metadata plugin. In your sample, the title in calibre is Akira while if the title is being read from the filename, it could be Akira Vol (not sure if it will read after the first . in the file name.