anchor.diff:                </c:choose>
               </c:set>
             
  -            <th align="center" rowspan="2">
  +            <c:choose>
  +              <c:when test="${fn:length(resultsTable.columns) > 1}">
  +                <c:set var="headerStyle" value="border-bottom: none"/>
  +                <c:set var="headerRowspan" value="2"/>
  +              </c:when>
  +              <c:otherwise>
  +                <c:set var="headerStyle" value=""/>
  +                <c:set var="headerRowspan" value="1"/>
  +              </c:otherwise>
  +            </c:choose>
  +
  +            <th align="center" rowspan="${headerRowspan}">
                 <html:multibox property="selectedObjects" styleId="selectedObjects_${status.index}${dataType}"
                                onclick="selectColumnCheckbox(${status.index}, '${dataType}')"
                                disabled="${resultsTable.maxRetrievableIndex > resultsTable.size ? 'false' : 'true'}">
  
positive.code:               </html:multibox>
              </th>
  
              <th align="center" valign="top" style="border-bottom: none">
                <div>
                  <c:out value="${fn:replace(column.name, '.', ' > ')}"/>
                </div>
  
negative.code:               </div>
              </th>
            </c:forEach>
            </tr>
          </c:if>
  
          <%-- The data --%>
  
  