Hi Tim,
Admin Tools DOES NOT automatically create a .htaccess file for you. There is exactly one way to create a .htaccess file using Admin Tools and that is by using the .htaccess Maker page. There is also exactly one place where the domain name and directory is configured in .htaccess Maker, in the System Configuration pane. The first two options there need your domain name without the the http:// or https:// prefix and the last option needs the subdirectory, or / in the typical case where Joomla! is installed on the site's root.
The only other place where you might find a reference to an old domain name is the SEO and Link Tools page, but this domain name is used to redirect from, not redirect to, the old domain name.
Regarding the IP addresses you see in the query, this is the IP address of the user currently accessing the site, not the site's IP. Look at the query. It's checking to see if you're on a blacklist. How this IP ended up there? Well, you access your site from this IP, this IP is reported to the web server, the web server reports it to PHP and PHP reports it to Admin Tools.
Overall, I am convinced that your problems have nothing to do with Admin Tools but have everything to do with the use of a temporary URL which, as I have said a gazillion times, is known to cause issues. Redirections rarely work with a temporary URL and, guess what, Joomla! uses a ton of redirections, after each data modification step. Likewise for POST requests. Moreover, a temporary URL does not allow the web server to report the correct domain name and path to Joomla!, therefore you must edit your configuration.php file and set the $live_site parameter to your temporary URL, i.e. http://72.52.155.159/~fusworg in your case. Let me reiterate this: temporary URLs and Joomla! don't mix very well. Every time I've tried it, I've had huge issues. When activating the regular domain name on the host, all those weird problems ceased. My advice is to have a "spare" domain name and attach it to your in-development site instead of using a temporary URL. When you're done developing, attach the regular domain name to your site and you're done. Trust me, it will save your sanity.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!