Checkout - Totals of the cart item amounts do not match

Hi everyone,

I'm struggling with Opencart checkout, this is the message I get:
The totals of the cart item amounts do not match order amounts.

I'm using QuickCheckout extensions and PayPal Website Payment Pro as a Payment Module.
My OpenCart version: 1.5.3.1
URL: http://www.rosemaryandco.com

Kind regards,
Fabrice

The PayPal website Payment Pro module that comes with OpenCart doesn't send any item amounts to PayPal, therefore shouldn't generate that error.

Are a 3rd party payment module or any other modifications?

Thanks for replying. Yes indeed it doesn't send them - I found out the previous developer working on this project had an addon that would send the items to PayPal, causing the errors.