2. It seems like you are using Toolset Starter theme.
If yes, then I need to clarify that this is the default behaviour of Layouts, when you are using Toolset Starter theme. And if you want to display content on specific pages or posts where no layout is assigned then you can create a Layout with error message or anything you want to display if no layout is assigned to content and assign this to your specific pages or posts. See attached screenshot.
Thank you
This ticket is now closed. If you're a Toolset client and need related help, please open a new support ticket.