I have an datatable with sorting working without a problem.

<rich:dataTable value="#{textSearchExtendendDataModel}" var="item" rows="10">
 <rich:column sortBy="#{item.idTicket}">
 <f:facet name="header">Id</f:facet>
 <h:outputLink value="#" onclick="redirectTicket(#{item.idTicket});">
 #{item.idTicket}
 </h:outputLink>
 <br />
 <h:outputLink value="#" onclick="loadTicket(#{item.idTicket});" styleClass="nowrap">
 <h:outputText value="Preview" />
 </h:outputLink>
 </rich:column>
 <rich:column sortBy="#{item.tbItrSyntheticLs.tbAreaByIdArea.l1DescriptionForLucene}">
 <f:facet name="header">Area</f:facet>
 #{item.tbItrSyntheticLs.tbAreaByIdArea.l1DescriptionLong}
 </rich:column>
...
</rich:dataTable>

When i add a subtable to display some detail data i get a strange behaviour in the header as you can see on the image http://img413.imageshack.us/my.php?image=subtableheaderhg6.png

<rich:dataTable ...>
...
 <rich:subTable var="subItem" value="#{item}">
 <rich:column colspan="7">
 <h:outputText value="#{textSearchExtendendDataModel.resultHighlighter(subItem.idTicket)}" escape="false" />
 </rich:column>
 </rich:subTable>
...
</richDataTable>

If i use a code like http://livedemo.exadel.com/richfaces-demo/richfaces/dataTable.jsf i get the expected result but i lost the sort feature. I already tried to put the "SortBy" on the header facet, on columns definitions and even both.

Can someone help me ?

TIA.