the server validation code has code to validate form fields that do not exist in your page:
Comments
addblock
seconddblock
if you are going to remove those form elements, you will need to also delte the following lines:
16: $WAFV_Errors .= WAValidateRQ(((isset($_POST["Comments"]))?$_POST["Comments"]:"") . "",true,3);
19: $WAFV_Errors .= WAValidateRX(((isset($_POST["addblock"]))?$_POST["addblock"]:"") . "","/^$/i",false,6);
20: $WAFV_Errors .= WAValidateRX(((isset($_POST["seconddblock"]))?$_POST["seconddblock"]:"") . "","/^$/i",false,7);
for the error in dreamweaver, if you look at the original contact form, the text boxes are created as spry form elements:
<span id="sprytextfield1">
<input name="Contact_Name" type="text" class="inputValue" id="Contact_Name" onblur="if (document.getElementById('nameServerError')) document.getElementById('nameServerError').style.display='none'" value="<?php echo(ValidatedField("contact","Contact_Name")) ?>" />
<span class="textfieldRequiredMsg">A value is required.</span></span>
your form elements are not spry form elements so the script code at the bottom is not needed.