Good Day,
Just thought I'd drop by to clarify that Hostmonster does use Linux servers (I apologize after re-reading what was written prior it was not clear).
I've been digging around the forums over the past day or so and found this snippet:
Hi This plug in is very useful and easy to use. but I have problem with it after I change my theme and I can not solve the problem. The them I use know RT-Theme 11 1.0 from theme forest the problem is when clicking the add to cart button the theme responses its 404 not found page. And when I go back to the page and refresh it I see the product I desire is added to the cart. the other problem is that when I try to remove the product from cart I found myself at the home page of my site.
----------
I solved the problem
$products variable is used in the theme for its own purpose and I replaced them with $wp_shopping_cart_products and my problem resolved
Not sure if this could be relevant at all but I went through and tried disabling all other plugins etc but didn't have any luck. It doesn't appear that there is a predefined custom post field in the theme for $product to replace either.
Thanks again :)
Cheers,