I only noticed recently that I have two homepages one: immersionimagery.com/ and the other immersionimagery.com/hd-video-media-dvd-...ydney-illawarra.html
What can I do to remove the /hd-video-media-dvd-production-sydney-illawarra.html? I do not really understand redirects.
What is the process to fix this issue?

Hi,
Open JoomSEF's URLs Manager and edit the Home page URL (it should be the very first link displayed in the list). There go to the Aliases tab and add "hd-video-media-dvd-production-sydney-illawarra.html" to Alias list field. After this the hd-video-media-dvd-production-sydney-illawarra.html SEF URL should be redirected to website's root URL.