delete lines 90 - 93:
$this->Shipping[] = new WA_eCart_Rule(urldecode("Shipping%20&%20Handling"), true, "WAEC_eCart1_ShippingHandling");
$this->Shipping[] = new WA_eCart_Rule(urldecode("Shipping%20&%20Handling%20per%20item"), true, "WAEC_eCart1_ShippingHandlingperitem");
$this->Shipping[] = new WA_eCart_Rule(urldecode("Shipping%20&%20Handling"), true, "WAEC_eCart1_ShippingHandling");
$this->Shipping[] = new WA_eCart_Rule(urldecode("Shipping%20&%20Handling%20per%20item"), true, "WAEC_eCart1_ShippingHandlingperitem");