http://code.google.com/p/wagic/issues/detail?id=706
these types were converted into part of the "types" enum and are no longer considered a subtype in the engine.
as they appear before Subtypes::LAST_TYPE they are to return "" as their subtype search result.
i figured there was no harm in including them in the types list filtering as they were moved from subtypes becuase they were some of the most frequently used subtypes.