Subdomain Redirects to Main WP-Admin on Post Creation

Just upgraded and changed hosts, which I’m sure is the root of this problem.

Did a full home folder backup and restore to the new host, everything back into public_html,redid the wildcard domain, reconfigured WP-config, and restored databases/users in mysql.

So bases should be covered here.

Problem is, on my subdomains, whenever I try to create or edit a page from within, it redirects to the main blog.
i.e. http://support.example.com/wp-admin/post-new.php?post_type=pagew redirects to http://example.com/wp-admin/post-new.php?post_type=pagew<a/&gt;

The theme on the sub-domain isn’t showing up correctly either.

Any ideas?