Hi Kim,
Since you have separated the original yahoo_contacts.csv file manually using Excel and still not working, so I would like to collect the screenshots of the 3 CSV file formats. You can send the screenshots through private message. To upload a screenshot, please refer to the steps below:
1. Click Use rich formatting.
2. Click Insert/Edit Media.
To protect your privacy, I will send you a private message, please follow the steps below to reply to the private message:
1. Go to the Your details section on the right side of the community site.
2. Click Private messages.
3. Click the subject title of the response to read the message.
4. You can reply by using the form that displayed.
5. Click Submit Reply.
Thanks,
Mouran