mailmunch and mailchimp

Everytime I get a new user they sign up and it comes to me from wordpress. I have the mailmunch forms but don’t understand why they keep coming through wordpress and yes I have integrated with same MailChimp list. still I have to add in manually for each one to sign up and this doesn’t work because in my form I’m asking for website url and yet every time someone signs up all I get user name and email from wordpress.