As you can see on the screenshot, the HCB shows here a weird behaviour.
The class in question is CLeonOptions which is declared as
class ATL_NO_VTABLE CLeonOptions :
public CComObjectRootEx<CComSingleThreadModel>,
public CComCoClass<CLeonOptions, &CLSID_LeonOptions>,
public IObjectWithSiteImpl<CLeonOptions>,
public IObjectSafety,
public IDispatchImpl<ILeonOptions, &IID_ILeonOptions, &LIBID_LeonAdmLib>
The _ComMapClass is a result of the BEGIN_COM_MAP macro in this class, but is basically just a typedef of CLeonOptions. The _ComMapClass can be expanded endlessly as the second shot shows.