I am having the same issue. Here is a link to the page. I am also having this issue on other webassist templates when I try to add the form with form builder.
If needed I will provide a screen shot of dreamweaver, but it looks the same as the one provided above with the same result. There does not seem to be any margins or padding settings to adjust. Also, adjusting the form width, seems to do nothing at all.
contact.php