Delete a Member from Membership Management

I entered an incorrect name and email address for a new member to Leadership Pathways Toastmasters Club 6820. I thought it was deleted and entered it again correctly. It is now entered twice -- both the correct name and email address. How do I fix this? the member's name is Mathew Wilson; his email address is mathew.wilson83@gmail. com.

I removed one of the duplicates using the "Delete People" from the Member Management tool.
All you had to do originally was change the email you didn't have to reenter.