Hello Gordon Smith,
Thank you so much for using our theme AcmePhotoPro. We recommend you to check all the available options on Appearance > Customize first.
After that Go to Appearance > Customize > Static Page and choose Latest Post there. After that all the post on the home page will appear like our demo. If you have any plugin installed, please uninstalled that as well and try it. Please visit this blog post to know about how to create gallery.
If you have any confusion, let us know.