The one additional port is the loopback I modified Craig's query to remove the loopback and the report shows all physical interfaces.
SELECT COUNT(InterfaceDescription) AS NumPorts, N.Caption
FROM NCM.Interfaces I JOIN Orion.Nodes N ON (I.Node.CoreNodeID = N.NodeID)
WHERE NOT ((InterfaceTypeName like '%Virtual%') OR (InterfaceTypeName = 'other') OR (InterfaceTypeName like '%loop%'))
GROUP BY N.NodeID, N.Caption
ORDER BY NumPorts DESC