I have the same problem, the menu stays open and does not go back.
I'm starting to edit the web yet, there's still a lot of original text and the rest. It's not finished yet. But the menu makes it from the beginning, from the installation.
http://www.moderni-prodej-nemovitosti.cz/All I've already said is a completely new installation of Joomla with a template and now everything is fine