Can someone please help me with big navigation errors on my website. I have tried posting in the add-on help discussion with no reply. I put on a mod to turn the nav cat tabs into a drop down menu. It was just a matter of adding styling to the tpl_modules_categories_tabs.php file. Since doing this the navigation is stuffed up, breadcrumbs have had to be switch off. If you browse around in a few categories, it will start not letting you go in to other categories. If you look at

Cat A - SubCat A - Product 1, then if you want to go back and look at SubCat B, you can't! Cat A will default to Subcat A.

PLEASE HELP! It wasn't much to edit so I can't have done much wrong, but not being an expert at this I don't know whats doing it.

My site link is here.

thanks