It’s working now, because I found someone who could fix it. This is what he told me:
“The form was being setup to make an ajax and load the results into that area and it was supposed to also handle the processing, I saw that the ajax submission was just calling: https://zhuliajewels.com/ which is just the home page, that is why you were getting all that stuff in there. So I looked at mailchimps example and it pointed to the actual script called “/wp-content/plugins/mailchimp/mailchimp_ajax.php”. For some reason the plugin wasn’t setting this up right, so I just hard coded it.”
Judging from this, I would say the plugin is not written very well.