The Add Blog Post button not appearing until you click on a blog post first (for bloggers) – this happens when you have an instance of the module on a page and set to Personal (then pick a blog from the list)
This option is useful for project and department pages where you drop the module to the page, set the personal mode to a specific blog. But then as bloggers get to the page the Add Blog Post button is missing. Clicking on a blog post reveals it as if when its set to personal mode it somehow does not know the user has permission until they click on a post.