Welcome to Microsoft Q&A forum. It's my pleasure to help you today.
I understand that you are confused about the event duplication on your Reliability monitor screen. May I know if you know when did the issue start or if you have just notice it by now.
As I checked, this might be caused by an update to the Dell Support Assist, so disable the Dell Support Assist Services or uninstall it might solve the issue. Could you please try it and tell me if it works?
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