Sumatorias con Limites

[Urso]

Tengo un problema tengo unos queries que sacan un solo resultado y es una sumatoria, cuando los limito no me sale el calculo que debe de ser. No se si tenga que reacomodar o reformular el query. Ahi les dejo el codigo.

Código:

    $SueldoTotal       = "SELECT SUM(E.Sueldo) FROM empleados E ";   
    $BonoTaxiTotal     = "SELECT SUM(REE.pago_evento) FROM rel_eventos_empleados REE ";
    $PagoExtraTotal    = "SELECT SUM(PE.Cantidad) FROM pagos_extras PE ";
    $string       = $vNombre."_".$vAPPA."_".$vAPMA."_".$vSUELDO."_".$vEXTRAS."_".$vTAXI."_".$vBONO;
 
    $cadena       = explode("_",$string);

    $Nvals          = array_filter($cadena);
    $countNvals   = count($Nvals);
  
    //Siguiente codigo es el WHERE del Select de busqueda
    IF($countNvals>=1) 
    {//1
      $sql    .= " WHERE ";
      $rela   = "SELECT id_empleado FROM rel_eventos_empleados WHERE ";
      
      IF($Nvals[0])
      {//2
       $sql   .= "E.nombre LIKE '%$Nvals[0]%' ";
       IF($countNvals>1 AND $Nvals[0]!=$Nvals[max(array_keys($Nvals))])
        $sql  .= " AND "; 
      }//2
      
      IF($Nvals[1])
      {//3    	     
       $sql   .= "E.Apellido_Paterno LIKE '%$Nvals[1]%' ";
       IF($countNvals>1 AND $Nvals[1]!=$Nvals[max(array_keys($Nvals))])
         $sql .= " AND ";  
      }//3
      
      IF($Nvals[2])
      {//4       
       $sql   .= "E.Apellido_Materno LIKE '%$Nvals[2]%' ";
       IF($countNvals>1 AND $Nvals[2]!=$Nvals[max(array_keys($Nvals))])
         $sql .= " AND ";        
      }//4
      
      IF($Nvals[3])
      {//5
 
       $SueldoTotal    .= " WHERE E.sueldo = $Nvals[3]";
       $BonoTaxiTotal  .= ",  empleados E WHERE E.id_empleado = REE.id_empleado AND E.sueldo = $Nvals[3]";
       $PagoExtraTotal .= ",  empleados E WHERE E.id_empleado = PE.id_empleado AND E.sueldo = $Nvals[3]";
  
       $sql   .= "E.Sueldo = $Nvals[3] ";    
       IF($countNvals>1 AND $Nvals[3]!=$Nvals[max(array_keys($Nvals))])
         $sql .= " AND ";      
      }//5
      
      IF($Nvals[4])
      {//6
       $IdPagoExtra    = "SELECT id_empleado FROM pagos_extras WHERE cantidad = $Nvals[4]";    
       $resIdPagoExtra = mysql_query($IdPagoExtra);  
       $rowIdPagoExtra = mysql_fetch_row($resIdPagoExtra);
 
       $SueldoTotal    .= ",  pagos_extras PE WHERE PE.cantidad = $Nvals[4]";
       $BonoTaxiTotal  .= ",  pagos_extras PE WHERE PE.id_empleado = REE.id_empleado AND PE.cantidad = $Nvals[4]";
       $PagoExtraTotal .= "WHERE PE.cantidad = $Nvals[4]";
       
       $sql .= " E.id_empleado = $rowIdPagoExtra[0] ";
       
       if(!$resIdPagoExtra) 
       {//7
	    //echo @mysql_errno($result);
        die('Invalid query(1): ' . mysql_error());
       }//7        
      }//6
 
      IF($Nvals[5] OR $Nvals[6])
      {//8            
         IF(empty($Nvals[5]))
          $rela  .= " pago_evento = $Nvals[6] ";
         ELSEIF(empty($Nvals[6]))
           $rela  .= "pago_taxi = $Nvals[5] "; 
         ELSE
          $rela  .= "pago_taxi = $Nvals[5] AND pago_evento = $Nvals[6] "; 
         
         IF(!empty($Nvals[5]))
         {//9
          $SueldoTotal    .= ", rel_eventos_empleados REE WHERE E.id_empleado = REE.id_empleado AND REE.pago_taxi = $Nvals[5]";
          $BonoTaxiTotal  .= " WHERE REE.pago_taxi = $Nvals[5]";
          $PagoExtraTotal .= ", rel_eventos_empleados REE WHERE PE.id_empleado = REE.id_empleado AND REE.pago_taxi = $Nvals[5]";
         }//9
         
         IF(!empty($Nvals[6]))
         {//10
          $SueldoTotal    .= ", rel_eventos_empleados REE WHERE E.id_empleado = REE.id_empleado AND REE.pago_evento = $Nvals[6]";
          $BonoTaxiTotal  .= "WHERE REE.pago_evento = $Nvals[6]";
          $PagoExtraTotal .= ", rel_eventos_empleados REE WHERE E.id_empleado = REE.id_empleado AND REE.pago_evento = $Nvals[6]";
         }//10      
      }//8

      $i=0;
      $BonTax    = mysql_query($rela);
        
      while($rowBonTax = mysql_fetch_row($BonTax))
      {//11
         $sql .= "E.Id_empleado = $rowBonTax[0] ";
         $i++;
         if($i>0 and $i<mysql_num_rows($BonTax))
          $sql .= " OR "; 
      }//11
        
      IF($Nvals>0 AND $Nvals <$Nvals[max(array_keys($Nvals))])
        $sql .= " AND ";
  
    }//1//Termina WHERE del query principal de busqueda
    $result = mysql_query($sql);
 
    if(!$result) 
    {
      echo "LA BUSQUEDA QUE ESTAS REALIZANDO NO ES FACTIBLE ";
      $sql               = "SELECT E.id_empleado, E.Nombre, E.Apellido_Paterno, E.Apellido_Materno, E.Sueldo FROM  empleados E ";
      $result            =  mysql_query($sql);
      $SueldoTotal       = "SELECT SUM(E.Sueldo) FROM empleados E ";   
      $BonoTaxiTotal     = "SELECT SUM(REE.pago_evento) FROM  eventos_empleados REE ";
      $PagoExtraTotal    = "SELECT SUM(PE.Cantidad) FROM pagos_extras PE ";
    }
    
    $resPagoExtraTotal = mysql_query($PagoExtraTotal);
    $rowPagoExtraTotal = mysql_fetch_row($resPagoExtraTotal);
    $resBonoTaxiTotal  = mysql_query($BonoTaxiTotal);
    $rowBonoTaxiTotal  = mysql_fetch_row($resBonoTaxiTotal);
    $resSueldoTotal    = mysql_query($SueldoTotal);
    $rowSueldoTotal    = mysql_fetch_row($resSueldoTotal);