Can't found the Error

i work on the page arcadeautomaten-telespiele.de  and i made a new start site and sub site. 
I made a mobile menu and selected the new content. 
And forced the new startpage in mobile joomla. 

At the 1st try it worked well. But after change from the content of the sub page all clicks opend the forced home page

I saw the right page alias url in the browser but i see always the forced main page

Does anybody know what for an error i've made? Uninstall and reinstall doesnt fix it

What Joomla version do you use?
What are types of that two menu items?

Apply this patch to plugins/system/mobilebot/mobilebot.php:
github.com/mobilejoomla/mobilejoomla/commit/9fa5369bc5d7e9981024258ebebf8d5f6a26e8c7