Okay, just hang on for a bit. Danielle is checking some things for you.
In the meantime, go to cPanel and in your public_html you have a file called "htaccess". Click on the file and in the upper right-hand corner of your screen, click "Show file". Copy what's there and post it here so we can see what's in there. I wanna see if you have the add-on domain in there.