Enewsletters are active within your account and you are utilizing the advanced confirmation email for a Form (Kintera Thon or through the Forms Module). After submitting a form, the confirmation email received by a user includes additional enewsletter campaigns than what expected.
Scenario: A Contact Form asking users to subscribe to an eNewsletter is set up using the Addons for enewsletters. Within the advanced confirmation setup for confirmation emails, the event field eNewsletter Subscriptions (campaign_name) is added. A contact subscribes to one eNewsletter, but receives a confirmation email that includes 5 eNewsletters listed.
This is a common result of the event field eNewsletter Subscriptions (campaign_name). This field pulls all eNewsletter subscriptions a user is subscribed to for the account, not just the new eNewsletter signed up for within the Form.