splitted posts [error]

any idea?
i search this topic in forum. but i can’t fina anything.
i think this is not a theme problem and not about my posts.
my problem begins when i want to split a post. and the sidebar is goes to the bottom of the page. (if i open post’s own page there is no problem because of there is no splitted post.)

if you wanna see : http://www.talebesk.com

thanks samboll.