I think we need more info here to give some kind of answer
The title is passed in the printheader system. In each script we call printheader and pass the cat name or photo title and that gets printed in the title along with site name.
The page http://www.aacircle.com.au/forums/gallery/ has the title at the top of the browser stating "Main Index - ESL Photo Gallery". I would like to know how to have it state "ESL Photo Gallery - Main Index". Or better, even remove the words "Main Index".
Remove that name that you have hard coded in the printheader title statements in pp-inc.php and place that name in your Global Options in admin under your site name