What are the steps you are taking to get the form altered like this? I have tried to get this result in my testing, I took the contactus page and highlighted the form on the page and from the insert bar added CSS Form Builder. I left the form part alone and gave it a new design, then finished. In the page I have the fields with what look like their regular names. If I could reproduce the problem the same as you are experiencing it I would have a better chance of finding a solution to the problem. Please post back with this info and if you can include the form from the page so I can have an example of your output.
