If you can´t see the News you just added, check if it has a proper Label. You can find and edit your new on a page of Blog Posts. Click on Browse > Blog.
Label determines where News are displayed.
a) Label News displays blog post on the Home Page,
b) <Country>News (e.g. CzechNews) displays blog post on a National Page.
c) BestPractice displays blog post at the page Best Practice in the International section.
If you´ve already edited your Label and you still can´t see your News, refresh the page with the F5 button.
More about labels here.