Issue with subdomains on multisite with a bluehost addon domain

Hello! Having a little trouble here…

On bluehost, my partner has created two domains:
littlesmallshop.com – her own personal “primary” domain
shopvelvethelmet.com – our business site, and is an “add-on” domain

All that I want is to have a multisite specifically on shopvelvethelmet.com, so that we can create demos for our wordpress themes. (i.g: demo11.shopvelvethelmet.com)

I have seemed to successfully install multisite on shopvelvethelmet.com, except that when I create a site and visit the link, the page looks exactly like the primary domain page littlesmallshop.com. If you look at demo11.shopvelvethelmet.com, you will see that it looks exactly like littlesmallshop.com.

Here are what my files and setup look like:

.htaccess file:

#BEGIN WordPress

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# add a trailing slash to /wp-admin
RewriteRule ^wp-admin$ wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^(.*\.php)$ $1 [L]
RewriteRule . index.php [L]

# END WordPress

directly above the “happy blogging” statement:

define('WP_ALLOW_MULTISITE', true);

define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', true);
define('DOMAIN_CURRENT_SITE', 'www.shopvelvethelmet.com');
define('PATH_CURRENT_SITE', '/');
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);

bluehost wildcard subdomain setup:
*.shopvelvethelmet.com/public_html/

For days I have been researching and trying out everything I possibly can and cannot figure this out. Any /instructions would be greatly appreciated!!

Thank you!!