The wiki software is causing that redirect most likely. Try moving the index and htaccess out of the wiki folder and see if it continues. The site shown by the ip is not always the one on your main domain. Mine is http://66.220.18.187/ and it gives me the content of https://si3.raxsoft.com/ Thats a subdomain of an alias that I have (though oddly that happens to be the most used thing on my account, Im fine with it). Also, your dedicated ip can be used for FTP as well. I had to use mine for this during the outage on Friday. If you had it enabled beforehand (cP wont work to enable it) remote MySQL can be used over it too I believe (I didnt, so I used ssh and command line tools though that wont apply for non-admins).