[SOLVED] Problem with design on Post Pages

Hello,

I run the blog "http://geistreich78.info/"
During the last it was individualized by a professional. But from the beginning I´ve a problem.

If you click an a post. like
http://geistreich78.info/domain-busi...-com-vertrages
the Menu Icons look like a mess.
Also in right sidebar the areas last articles, last comments are postponed. They are not the same as in index sites or menu sites.

Do you know what to do?

Thank you for help...