Sync doesn't add contact in interest group
I have configured the sync with one audience and a certain number of interest groups. See screenshot. And I am experiencing a couple of issues.
1- The sync doesn't add the contact in the corresponding interest group in Mailchimp. This is what happening: 1- In CiviCRM contact Susan Doe is added in 2 groups: Master Mailchimp list (do not delete) and Teachers. 2- After the sync ran, contact Susan Doe has been added to the MailChimp audience list CiviCRM sync - do not add contacts manually but not in the interest group Teachers. 3- The sync ran again and then the contact Susan Doe has been removed by the sync from the Civi group Teachers.
How can we make the sync add the contact Susan Doe in the audience list and in the interest group at the same time, during the 1st sync?
2- For a new contact the sync doesn't transfer the first name and last name of the contact to MailChimp. Only the email address is added in MailChimp.
Thanks for your help.!