[Tiki-users] How sort by multiple fields using Sort Control Block

Hi there,

Is there a way or sorting content by means of "sort" control block 
sorting by more than one value? for example I'd like to execute a first 
sorting based on column A value; than, for each column A value, I'd like 
the content to be further sorted by column B value (hope it'clear).

My code currently look like this:

{LIST()}
   {filter field="tracker_id" content="19"}
   {sort mode="tracker_field_macchineTipoMacchina_text_asc"}
   {OUTPUT(template="table")}
     {column label="Macchina" field="macchina"}
     {column label="Tipo" field="tipo"}
   {OUTPUT}
   {FORMAT(name="tipo")}{display 
name="tracker_field_macchineTipoMacchina_text"}{FORMAT}
   {FORMAT(name="macchina")}[Commesse.-.Macchina?itemId={display 
name="object_id"}|{display 
name="tracker_field_macchineNomeMacchina"}]{FORMAT}
{LIST}

I've tried also in the following way but the result is only the second 
{sort} is applied.

{LIST()}
   {filter field="tracker_id" content="19"}
   {sort mode="tracker_field_macchineTipoMacchina_text_asc"}
   {sort mode="tracker_field_macchineNomeMacchina_asc"}
   {OUTPUT(template="table")}
     {column label="Macchina" field="macchina"}
     {column label="Tipo" field="tipo"}
   {OUTPUT}
   {FORMAT(name="tipo")}{display 
name="tracker_field_macchineTipoMacchina_text"}{FORMAT}
   {FORMAT(name="macchina")}[Commesse.-.Macchina?itemId={display 
name="object_id"}|{display 
name="tracker_field_macchineNomeMacchina"}]{FORMAT}
{LIST}

Thank you for your time

Alessandro