rich:extendedDataTable after Sorting same query is getting fired

[paipai]

I have a RichFaces UI which are having sidebar menu and sidebar had 8 links.
I am using Seam @DataModel and @Factory and hibernate criteria to populate all the 8 pages.
In all the pages i have sortby functionality which is working fine.
I am able to get all data in all the 8 pages and I can freely navigate around all the links/xhtmls.
But if in one of the xhtmlpages if I do sorting or groupby after that I am unable to navigate to other pages.If I select any other link the same last query which is executed for sorting is getting executed.
Is this an issue? or do I need add any configuration.
Please help me in solving this issue.
Below is the codesnippet
one of the 8 xhtml
               <rich:extendedDataTable id="listRegion" rows="30"
               value="#{regions}" var="p">
               
               <rich:column sortable="true"
                   sortBy="#{p.regionid}" width="100px" label="Region Id">
               <f:facet name="header">
               <h:outputText value="Region Id" />
               </f:facet>
               <h:outputText value="#{p.regionid}" />
               </rich:column>
               
               <rich:column sortable="true"
                   sortBy="#{p.region}" width="100px" label="Region Name">
               <f:facet name="header">
               <h:outputText value="Region Name" />
               </f:facet>
               <h:outputText value="#{p.region}" />
               </rich:column>
</rich:extendedDataTable

Sidebar
          <rich:panelMenuItem label="Region" action="/regionList.xhtml" />

Action

     @DataModel("regions")
     private List<CoreRegion> listRegions;
     
     @Factory("regions")
     public void getRegions() {
          System.out.println("Inside get Regions");
          Session userDatabase = HibernateUtil.getSession();
          Criteria crit = userDatabase.createCriteria(CoreRegion.class);
                    listRegions = crit.list();