Subdomain redirecting to another domain on my server

I'm trying to create a subdomain that maps back to my root domain to serve static files. I want static.domainA.com to point to domainA.com.

In cPanel, I setup static.domainA.com and pointed it to the /public_html folder. Then I changed the Alias of static.domainA.com to www[dot]domainA.com.

When I visit static.domainA.com, it redirects to store.domainB.com (domainB.com is another account I have setup on my server). So basically static.domainA.com is working perfectly, except it is aliasing the wrong domain (store.domainB.com instead of domainA.com).

Any ideas on what is going on here? Thank you!

Server Details:

/etc/redhat-release:CentOS release 6.8 (Final)
/usr/local/cpanel/version:11.60.0.35
/var/cpanel/envtype:kvm
CPANEL=release
Server version: Apache/2.4.16 (Unix)
Server built: Dec 9 2015 19:19:34
Cpanel::Easy::Apache v3.32.6 rev9999
PHP 5.6.16 (cli) (built: Dec 9 2015 19:29:45)

 

Thanks for the reply Michael.

After I created the subdomain through cPanel, I went to the Advanced DNS page and saw an A Record listing for static.domainA.com with the alias being my server's IP address. I changed this to a CNAME Record and changed the alias to www.domainA.com.