in the CSSFormBuilder/FD_FirthWebWorks_Default.css file change the form.FirthWebWorks_Default fieldset.FirthWebWorks_Default selector to:
form.FirthWebWorks_Default fieldset.FirthWebWorks_Default {
/*clear:both;*/
clear:right;
border-width:0;
}
and add a span tag around the Contact_Form_group_Phone form element:
<span><input id="Contact_Form_group_Phone" name="Contact_Form_group_Phone" type="text" value="" class="formTextfield_Medium" tabindex="4" style="display:inline;"/></span>