When invoicing only some products, invoice creation fails with the error "QuickPay Validation error: amount - is too large", but amount is captured in Quickpay.
Only way to make a partial invoice, is to select "Capture offline".
@nwyke I suggest that you update your Magento together with QuickPay's module. The case you have mentioned above couldn't have been replicated in our test environment with latest Magento and QuickPay versions.
When invoicing only some products, invoice creation fails with the error "QuickPay Validation error: amount - is too large", but amount is captured in Quickpay. Only way to make a partial invoice, is to select "Capture offline".