Thanks for providing the URL so I could verify the hosting.
Are you referring to Pages or to Posts? The two are not the same http://en.support.wordpress.com/post-vs-page/
The front page of the blog by default will display your posts (not pages) in reverse chronological order, with the most recently published post on top. The only way that can be changed is by setting a static front page. To do that create two pages > http://en.support.wordpress.com/pages/ After you do that you go to > Settings > Reading and make the designation change and click “save changes”. http://en.support.wordpress.com/pages/front-page/
If that's not what you mean and you are referring to Pages that are not displaying in the menu bar I suggest you go to > Dashboard > Pages > All Pages and hover over the Page titles then click "edit" and check the page visibility settings in the Publish module.
edit pages screen http://en.support.wordpress.com/pages/edit-pages-screen/
Troubleshooting – My Pages aren’t appearing
They must be public pages – not private and not draft.
Public – The page will be visible to everyone.
Protected – The page is protected with a password you set. Only people who have the password can view a protected page.
Private – Pages are only visible to blog Editors and Administrators. Private pages are not visible in Reader, feeds, or in any search. A page can be private without being password protected.
If you created a custom menu http://en.support.wordpress.com/menus/ then you can add Pages to it and create the order you want.
There are many common errors, misunderstanding and misconceptions when creating custom menus and you can read about them here > http://wpbtips.wordpress.com/2011/12/19/custom-menus/