Fresh and Clean is functioning exactly how it's designed to. The themes is not designed to display full posts on the front page of the blog.
On a theme that has an active excerpt box below the post editor, you can control the length of the excerpt displayed. This will have to be done on every post. This is the workaround you can use to override excerpt display on the front page.
When creating a post or page on your WordPress.com blog, you have two editing modes available to you: Visual Editor and Text Editor (HTML).
You compose your whole post first in the Visual editor and before you publish it you switch to the HTML (Text) editor, copy all the code you find there, paste it into the Excerpt box, and publish the post. http://en.support.wordpress.com/splitting-content/excerpts/#creating-excerpts