Why my form looks different in preview mode and in builder?

What my form looks like in the builder is always different (and more messy) in the preview page. Why is it changing how my form looks?

Greetings and thank you for your message.

I have checked both of your forms, and I was not able to find any differences when viewing the form in the builder more or in preview mode.

Please send us the screenshot of the difference you are seeing. You can click here to see how to post images.

Thank you for your cooperation.