New Marketpress - The totals of the cart item amounts do not match order amounts.

Hi,

Struggling with the new MarketPress now getting
10413 - The totals of the cart item amounts do not match order amounts. when going to paypal

I have granted support access ( I don't want to publicise the url so you will find the site using MarketPress under blog id 64
e.g. wp-admin/network/site-info.php?id=164 )