Hi Seldovia,
i have checked 2 websites, since your site and the example site use different theme. I think you will need to change style css of the plugin super recent posts.
Hope this helps!
You must have to check the .htaccess file if it is writeable.
If not writeable you must have to chmod this file.
After chmod you still dont have write permission so you have to look at the own/group of this file and use chown command to change it to right group.
It will request SSH access to do chown, or you have to contact the hosting manager to do it for you!