There may be several reasons for this. 

1. Your referral has not registered yet. Only after registration you can see a part of his e-mail or wallet address in the table. The best way to ensure your referral has registered is to ask him personally. If your referral has registered, there is another reason for that, described in paragraph 2;

2. There may be a situation when your friend registered, but did not appear in the list. In this case, the user could have registered from another device or did not do it through your referral link. If this happens, please write to the support service with the data of your referral - his name, and the approximate date when he could have registered, and after verification, we will assign him to you.