sitemistic
Let me explain a bit here:
You are having 2 menus with the same menu items:
Main menu: you have: Home / Home News / ...
Topbar menu left: you also have Home / Home News / ...
The default page now is 'Home News' in 'Topbar menu left' menu but you're showing 'Main menu' on frontend (not 'Topbar menu left' menu) so when you click Home or Home News items, they are items in Main menu and they looks different that default page because some modules like 'Brick' module is assigned to 'Home News' in 'Topbar menu left' menu only.
So what you should do now is deciding what menu you want to keep, if you want to use 'Main menu', you have to set the default page for a menu item in this 'Main menu'.
Then assign modules to the correct page.
Again, the documentation above lists out all modules on homepage already. Pls follow it.