The expected result for windowing query Q19 seems to be missing a bundle for orderId OID02. 
The ConfirmationRequest for OID02 follows immediately after the OrderRequest for OID2. The second window (with $wSPrev/@orderID eq "OID02) is closed because of the first ShipNotice element. Hence, there is a new window for OID02.

The result should be changed as follows:

<result>
  <bundleWith orderId="OID01">
    <OrderRequest billTo="ACME1" date="2006-01-02T14:00:00-00:00"
      orderID="OID03" shipTo="ACME1" total="10000" type="new">
      <Item partID="ID3" quantity="100" unitPrice="100"/>
    </OrderRequest>
  </bundleWith>
  <bundleWith orderId="OID02"/>
  <bundleWith orderId="OID03"/>
</result>