I recently downloaded the Mailchimp add-on 1.0RC1. I have added it to a form for testing. If I submit a NEW subscriber via the webform, it is properly added to the MC database, both with or without the double opt-in option selected. However, if in the webform I enter an email (that I know is already in the database), with updated info (e.g. changed last name), it does NOT update the MC info. Is this supposed to happen? If so, how?