sub totals/shipping appearing twice

[Steveinjava]

I have a weird feature whereby at the Order Confirmation page I get shipping, tax and total fields appearing twice as below...

Sub-Total:   £21.50
Zone Rates (Shipping to GB : 0.25000 lb(s)):   £8.52
Zone Rates (Shipping to GB : 0.25000 lb(s)):   £8.52
VAT:   £3.76
VAT:   £3.76
Total:   £33.78
Total:   £33.78

I am newish to struts and cannot find the offending code. I note there is a db table called orders_total which includes these fields (With duplicates). An email confirmation sent to the test client also included the duplicate fields. Can anyone point me to the offending code- or any other explanation?
I have Product Discount, Order Total Discount, Shipping, Sub-Total, Tax & Total modules installed. (I have tried reinstalling them)
Many thanks!