Trouble with Default Template from New Blog Templates Plugin

Hi - I have created a new template via the New Blog Template plugin, and have set it to the default. But when I create a new test site (http://childcare-provider.com/website-registration/), it doesn't default to the template, it defaults to twentysixteen theme. Can someone please have a look and see what I'm missing here? I have granted support access.

By the way, I have removed the plugin "Default Template" to avoid any mixed signals that plugin may have with the New Blog Templates plugin. I would happily just use that Plugin, but I was not seeing my Default Template in the dropdown list.

Thanks a lot for your help.