I set up a form using the Constant Contact Form Generator.
I have the form going to a new list that I created in my account.
The problem I am having is the form wont add people if they are already on a list on my account.
I want to make it so that the form will add people to this new list, whether they are already in another list or not.
The forms generated by the CCSFG do not by default update list membership for existing contacts, for security reasons, as explained here. If you understand and accept the risks outlined there, you can request a version of the CCSFG that will update contacts from our Webservices Team.