You need to check if all user-friendly URLs are unique for all pages
Please check - have you inserted Google.com Maps API key to map's properties (right click on map in site builder). If you have more than one map on your page, you need to insert API key in all maps.
Create your API key here.
Please check if you turned Wide/Tablet/Mobile versions. If it‘s turned on and you still can‘t see any changes, be sure that you‘re checking the same version in site builder and browser. For example, if you‘re checking Mobile version, both site builder and browser should have Mobile menu button.
Container width changes automatically for each Wide/Tablet/Mobile website versions.
To change your website layout into Landing, click on Settings icon in website builder and mark Landing.
Each template has its own default elements and each element is placed differently per template. So, after changing template, your created website will be lost.