You got me here to help you get this sorted out, Denford.

I've got an option you may wish to consider to get rid of the error message. You'll want to add an indication so QuickBooks will think that they are different entries/products. Please see screenshot below:

Once done, try uploading a file to Excel again to see if it works. Otherwise, you may contact our Customer Care Support to further assist you with this. They have available resources that can do a screen-share with you to better assist you. You can contact them through this link: Contact the QuickBooks Online Customer Support team

Please let me know how it works. I want to make sure this is taken care of.