User Submitted for Deletion

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I have a user on my site. When I view them in "Members", I get 2 popups in the top right. Both are the same and say:

User Submitted for Deletion.

Submitted by <username> on <date>, <time>.

Both have a Review button that, when clicked, show me the user details in a popup.

How did this happen, and how can I stop it from doing this? I don't want to delete the user.

GeeEM