can't add new member

I'm not able to add a new member to the members list. I had 2 to add and one went fine but the second one keeps disappearing. I'm not sure what the problem is or how to fix it. I've tried several times over 2 days and I still can't get the name to stay on the list. What am I doing wrong?

Can you provide your club number so that we can assist you?

yes its 2156

Is the new member already on your guests or prospects list? If so you should move them to the members list. Select the person and use the dropdown tool above the list to move to the members list.

Duplicates aren’t permitted.

Are you sure the email addresses are correct, if the email address of an opt-in email is incorrect the system will remove the entry.