Ok, I've finally got the e-commerce working, but I have another problem.

In my tracking code, I have two instances of the GA tracking code, which is causing my statistics to show an inflated hit count and an abnormally low bounce rate.

I look at the code in tpl_main_page.php and find one instance of the GA code and upon checkout, Zencart is adding an extra instance of the GA code.

How do I fix this?