When using CMS, the index page shows the Available Site Pages blue bars full width across the page after you create more than 3 available pages to edit.
This is causing the page to look wrong and the blue appears behind the last 5 actions, spoiling the whole appearance of the admin index page.
Im sure there is a simple css fix for this.
Can you give a url for this problem? It always help to solve the problem if we can see what is happening!