Hi @Matthew_Harris and welcome to the Forum.
First of all I would like to thank you for this detailed report and for trying to troubleshoot yourself with different options.
In your case, I would recommend you to reach out directly to our support team who will be able to take a closer look into this for you. When you do, make sure to reference the URL of this thread to save yourself from re-explaining everything. You can also add more screenshots if you like to.
Thanks again for your patience and cooperation, and my apologies for not being able to help you further in the Forum! Please let me know if there is anything else I can help with!