Hi Kristin,
please follow these steps:
- Log in to your MailChimp account
- Click on Lists in the navigation menu
- Click on the name of your list
- Click on Settings in the submenu and select List fields and *|MERGE|* tags
- You will see a list of the fields used for this list. Double check that your first name field has the tag called FNAME.
- If the tag is called differently, rename to FNAME and click on Save Changes
Once you have done this, your form should work fine.
Also, I see that your theme’s CSS is overriding the plugin’s CSS value for the input fields. This is why your input fields appear as they do. To fix this, add the following code to the Custom CSS field, located under Form Options in Optin Forms:
#optinforms-form1-name-field,#optinforms-form1-email-field{height:35px!important;}
Let me know if you need further assistance.