@OlusteveA, Thanks for posting in Q&A.
From your description, I know that some of your devices did not get Windows Update from Windows Update Ring policy.
To clarity the issue, here are some information you can check mentioned in the following link.
1.Verify the prerequisites that whether your devices meet.
2.Check whether the client devices applied the policy.
Please check above information, if there is any update, feel free to let me know.
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