anchor.diff:      var="description">
       <!-- NAME/SUBMISSION ID -->
   
  -    <h:column>
  +    <h:column rendered="#{submissionStatus.sortType ne 'lastName'}">
        <f:facet name="header">
           <h:commandLink immediate="true" id="lastName" action="submissionStatus">
             <h:outputText value="#{msg.name}" />
  
positive.code:      </h:panelGroup>
      </h:column>
  
     <!-- STUDENT ID -->
      <h:column>
       <f:facet name="header">
         <h:commandLink id="idString" action="submissionStatus" >
            <h:outputText value="#{msg.uid}" />
  
negative.code:     </h:column>
  
      <!-- ROLE -->
      <h:column rendered="#{submissionStatus.sortType ne 'role'}">
       <f:facet name="header" >
          <h:commandLink id="role" action="submissionStatus">
            <h:outputText value="#{msg.role}" />
  