My apologies.
From what I can gather from the posts in this topic, when an addon domain is used, it simply redirects the user from the addon domain to the main domain, folder or subdomain. 23kb.com is set as an addon domain on one of my accounts, miniphp.com. If you visit 23kb.com, rather than being redirected to the subdomain, you can browse the
website hosting from the addon domain.
I'm currently with another host, so that may explain the difference, but I thought the addon domain redirection would be identical across hosts all running cPanel. It's not a problem, just something I would be interested in finding out the reasons behind.
Please let me know if I am still unclear. I find this whole thing a little difficult to explain.