Thanks for updating in!
1.) The homepage of Ethos 1 demo content or your homepage is not editable with Cornerstone or even with the default WordPress editor because you have opted to display the latest blog posts. This setting can be found in Settings > Reading > Your homepage displays. The layout is using the pre designed blog index layout and the contents were generated dynamically by Wordpress. If you want to create a static home page, please check out this codex: https://codex.wordpress.org/Creating_a_Static_Front_Page#Creating_a_Static_Front_Page
2.) The demo images is not displaying. All of the featured images for example was replaced with this image: //www.ginafarr.com/wp-content/uploads/2018/05/img-1.png
Did you changed the featured images or maybe a 3rd party plugin is replacing it.
3.) The post carousel is only displaying one item because there is only one featured post. You may change it to display random or the most commented post item. This setting can be found in X > Theme Options > Ethos > Post Carousel. If you prefer the featured post, you must make sure that you have at least six post items that were set as your feature post item. For more information about Ethos settings, please check it here: https://theme.co/apex/forum/t/customizer-ethos-options/131
If you may want to, we can reset your WP installation again and we can install Ethos 1 demo content for you.
Please let us know how it goes.