TeRB on "[Plugin: Contact Form 7] CF7 Submit button linked to MailChimp Submit button"

My MailChimp (MC) subscription form is part of my header. I added Contact Form 7 (CF7), but when I click the submit button, I am taken to a MailChimp error page. Some how, it seems that the CF7 submit button is 'acting like' the MC submit button.

Any ideas? Thanks in advance.

https://wordpress.org/plugins/contact-form-7/