Please consult the Template Hierarchy, and ensure that you are using the correct names for template files.
index.phpshould be left as the default fallback for all other template files- The site front page template file name is
front-page.php. You need to rename yourhomepage.phpasfront-page.php - The blog posts index page template file name is
home.php. WordPress will always and only ever use eitherhome.phporindex.phpfor the blog posts index (unless the blog posts index is set to display on the site front page, andfront-page.phpexists). No other template files will be used, regardless of what you name them, or whether or not you assign them as custom page templates to the page used to render the blog posts index.
Step-by-step:
- Create
front-page.phpas your custom front-page template - Create
home.phpas your blog posts index page template - Leave
index.phpalone - Create two static pages, of any name; e.g. “Front Page” and “Blog”
- Go to
Dashboard -> Settings -> Reading - Set Front Page Displays to a static page
- Set Front page dropdown to “Front Page” static page created in step 4
- Set Posts page dropdown to “Blog” static page created in step 4