Why NAME input field is actually LAST NAME input field in the popup contact form?

Why NAME input field is actually LAST NAME input field in the popup contact form?

Hi,

I came across some impossible situation... While creating Smart Popup in the Marketing Hub we have 2 fields available: NAME and EMAIL. While registering to the form it comes out that the NAME is actually LAST NAME on the list... How is that even possible? I have all contacts importet from Mailchimp and all them have regular FNAME, and all from Zoho will have LAST NAME intead of first name? 

Please tell me i can chnge it somewhere. Thanks