Sorry, I should have provided more detail earlier. I have the payment gateway set to Paypal Standard and that all works perfectly as I get all the correct email notifications (from Paypal etc) when a order is placed and the payment is made, the order also appears perfectly in the admin page except my inventory levels are not reduced. (Gateway is not set to use sandbox)
I've been doing a lot of testing and placing real orders to ensure it is all perfect but I just realised my stock levels hadn't changed and where i have only only particular item in stock, when you then purchase it, it still shows afterwards as having one item still in stock, all other parts of the ordering / payment process work perfectly ?
No the site www.cymbalroad.com.au is not set to use test mode.