Thanks for your feedback and so glad to know that you issue is resoved now!
I would make a brief summary of this post so that other forum members could easily find useful information here:
[Resource Room show twice in room list - Summary]
Issue Symptom:
Resource Room show twice in room list from WEB
Solution:
If the issue is not caused by server side by checking the command: Get-DistributionGroupMember -Identity "room list"
That's may caused by browser cache.
We could clear the browser cache to resolve this issue.
You could "Accept Answer" for this summary to close this thread, and your action would be helpful to other users who encounter the same issue and read this thread. Thanks for your understanding!
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