Hi Daibor.
Thank you for using product our.
1. Because you use vertical menu that usually use in sidebar because position it small. You can custom css for it when use in position large.
You can give me link your site and your account of administrator via private or mail: This email address is being protected from spambots. You need JavaScript enabled to view it. I will check it for you.
2. You want to configure this parameter. Please create a menu item in Joomla After you can see this configure. Please view image
prnt.sc/b79vo4