Problems assigning custom templates

I have designed several custom templates for my site https://karminmusic.com/

The problem is – the templates are getting all mixed up with each other! Only the “Home” and “Follow” pages display the correct template. The site root tends to display the last template I’ve loaded, currently the Store template.

I’ve inserted labels into the template files in all caps preceding the content, so you can see as you flip through the nav menu what is displaying correctly and what is not. Everything is assigned as I want it to according to the WP dashboard.

Any ideas what could be wrong? This is a custom theme that is a modification of the default Kubrick theme if that matters. I thought it was a theme issue, so I tossed the premium theme my original modification was built on and applied my style and code to default, but it didn’t help.