Dennis, I'm only saying this because you seem to believe you've got the book formatted in a way that you really don't.
Your table of contents is not linked to the software's table of contents button. That means a person has to go hunting for it, which takes a long time. Navigation is greatly improved when it's linked. You can link it by using the Guide in Mobipocket Creator.
Also, your justification IS set for full and it CANNOT be changed. You should totally remove any reference to justification in your page code in order to allow the reader to set it the way he or she wants it.
Your cover image works fine. Good job on that.
Do you have the desktop reader? It's free and will allow you to test the files you create.