Users not presented in CSV file are not deleted

Hi there! First of all, thank you for the plug-in! It’s amazing! I will donate because it’s very useful for the community.

One thing still I cannot manage to finish and that’s the deleting part of the users that are in my database, but not in the CSV file. Let me reproduce my steps:

1. I go to the import dashboard;
2. I upload the CSV file;
3. I select Customer as the only Role (no other role was selected);
4. What should the plugin do with empty cells? – Leave old data;
5. Send e-mails – none of the checkboxes selected;
6. Force users to reset their passwords? – no;
7. Update existing users – I tried with both Yes and No;
8. Update e-mails – no (both tried with both options);
9. Update roles for existing users? – No;
10. Never update passwords;
11. Delete users that are not present in the CSV – CHECKED
12. Both admins thare are in the database are also in the CSV file;
13. No warnings after the import, just notices regarding that the users are already registered.
14. After the upload the old accounts are still there (in my database)

The page I need help with: [log in to see the link]