Thanks for checking back with us, @Matteo_S.

I wanted to confirm a couple of things. Upon importing your customers, are you saying that in the customer's name field their business name is showing as the first and last name, as well as the company and display name? 

If this is the case, I played around in my test company and noticed if you remove the first and last name, it will not show twice on the form. You can reference my screenshots below.

With the business name in both fields: 

Removing the business name from the First and Last name fields: 

Unfortunately, there isn't a way to edit the form to exclude one of the names. I understand how beneficial this would be for you and your company. With that said, I wanted to let you know I've gone ahead and submitted this suggestion to our Development Team. 

If there is anything else I can assist you with, please don't hesitate to let me know. Take care!