Problem with long coments …How put limit in coments?

I look many wordpress blog and manys have same problem.

When put a long coment he broken everything like mine

here: https://www.cdkeysnow.com/blog/ ( its ok )
here: https://www.cdkeysnow.com/blog/?p=5#comments ( i get big problem )

If somebody know how i can fix this, please help.
Thanks