Hi Marcus,
Thank you for pointing me in the right direction!
I understand more about the errors, and will be more informed when I speak with Shopify. I don't have any way of checking this myself & it is above my pay grade, anyway.
I noticed this was a topic on the Shopify forum discussion groups. The discussion didn't last too long which leads me to believe either:
1. people give up, or
2. it ends up resolved.
We'll see. In any event, thank you for taking the time to respond. I have just started using MOZ and I'm very impressed with this community!
Fetch Joy!
Sharon