Your hidden field for the parcel id seems to be set wrong. You have:
<input name="ParcelID" type="hidden" id="ParcelID" value="<?php echo((isset($_POST["ParcelID"]))?$_POST["ParcelID"]:"") ?>">
and I think it should be:
<input name="ParcelID" type="hidden" id="ParcelID" value="<?php echo($Recordset1->getColumnVal("ParcelID")); ?>">