Contact being added to the wrong list

We have numerous lists. We have a constant contact list called ‘blog’. We have that list checked in plugin, but contact names that sign up on our blog keep getting added to another list, which happens to be the first one displayed in the lists shown in the plugin. It is not even the default list.

“Single checkbox” is checked as the User Subscription Method. “Opt-in users by default?” is unchecked. Either way did not make a difference.

If it cannot be fixed in the plugin, is there a file I can manually change something in to enter the ID of the list we want to use? thanks.

http://wordpress.org/extend/plugins/constant-contact-signup-form-widget/