We have installed 2 extensions on Magento 1.9.3 one is a one page checkout extension found here: https://www.magentocommerce.com/magento-connect/onestep-checkout.html and the other is a delivery time scheduler found here: https://store.biztechconsultancy.com/magento-delivery-date-scheduler.htm
The delivery date scheduler works on the default OPC on Magento and posts the correct data to Sales Flat Order table.
If I enable the onestep-checkout it doesn’t post the data to the table?
Can someone let me know what part of the code in the ecosystem of Magento I need to look at so I can get it to post the data when this extension is enabled?
Regards