[Plugin: Constant Contact for WordPress] Add subscribers to only one Contact List

I want to add subscribers to only one Contact List, but the subscriber is subscribed to ALL active contact lists.

I have used a shortcode to place the form on a page in my wordpress blog – however when the user subcribes, they are added to all of my campaigns. Is there a shortcode to use to add them to one campaign instead of all of them?

Please help. All feedback is welcomed and very appreciated.

P.S.
I am using the shortcode [constantcontactapi formid=”0”] so that the form will show up on a page.

https://www.ads-software.com/extend/plugins/constant-contact-api/