I figured it out after playing around.
The way you have the pictures shown is to select the right “Format” attribute on the post. “Format” is on the right hand navigation on your edit post page. If you choose the pictures to be “image”, it will show under “image” on home page. If you choose the pictures to be “Gallery”, it will show in “Gallery” on home page.
At the bottom of edit post page, you just need to set “featured image” in the post. This will be the image shown on home page either in “Image” or “Gallery”.
