Cart totals sometimes show GST and sometimes not.

Hi,

if you visit our site http://nealsyardremedies.com.au and add some products to the cart, then proceed to checkout, you'll notice there is no GST line.

However if you then click the checkout now button, fill in your order details and "continue checkout" to get to the paypal page, then click the "cancel and return" link on paypal's page, then click on the nyr shopping cart link, you will see now the cart shows GST.

see screen shots:

no gst
http://take.ms/A6p7f
with gst
http://take.ms/cndJf

currently "enter prices inclusive of Tax" is set to No.