diff --git a/libs/daux_directory.php b/libs/daux_directory.php
index a34875a..b39a2ef 100644
--- a/libs/daux_directory.php
+++ b/libs/daux_directory.php
@@ -96,13 +96,33 @@
             $name_a = explode('_', $a->name);
             $name_b = explode('_', $b->name);
             if (is_numeric($name_a[0])) {
-                if (is_numeric($name_b[0])) return (intval($name_a[0]) > intval($name_b[0]));
-                return -1;
+                $a = intval($name_a[0]);
+                if (is_numeric($name_b[0])) {
+                    $b = intval($name_b[0]);
+                    if (($a >= 0) == ($b >= 0)) {
+                        $a = abs($a);
+                        $b = abs($b);
+                        if ($a == $b) return (strcasecmp($name_a[1], $name_b[1]));
+                        return ($a > $b) ? 1 : -1;
+                    }
+                    return ($a >= 0) ? -1 : 1;
+                }
+                $t = $name_b[0];
+                if ($t && $t[0] === '-') return -1;
+                return ($a < 0) ? 1 : -1;
             } else {
-                if (is_numeric($name_b[0])) return 1;
-                return (strcasecmp($name_a[0], $name_b[0]));
+                if (is_numeric($name_b[0])) {
+                    $b = intval($name_b[0]);
+                    if ($b >= 0) return 1;
+                    $t = $name_a[0];
+                    if ($t && $t[0] === '-') return 1;
+                    return ($b >= 0) ? 1 : -1;
+                }
+                $p = $name_a[0];
+                $q = $name_b[0];
+                if (($p && $p[0] === '-') == ($q && $q[0] === '-')) return strcasecmp($p, $q);
+                else return ($p[0] === '-') ? 1 : -1;
             }
         }
-
     }
 ?>
\ No newline at end of file
diff --git a/libs/daux_helper.php b/libs/daux_helper.php
index c4dbb10..5cc5960 100644
--- a/libs/daux_helper.php
+++ b/libs/daux_helper.php
@@ -31,8 +31,11 @@
         public static function get_title_from_filename($filename) {
             $filename = explode('_', $filename);
             if ($filename[0] == '' || is_numeric($filename[0])) unset($filename[0]);
+            else {
+                $t = $filename[0];
+                if ($t[0] == '-') $filename[0] = substr($t, 1);                
+            }
             $filename = implode(' ', $filename);
-
             return $filename;
         }
 
@@ -44,6 +47,10 @@
         public static function get_url_from_filename($filename) {
             $filename = explode('_', $filename);
             if ($filename[0] == '' || is_numeric($filename[0])) unset($filename[0]);
+            else {
+                $t = $filename[0];
+                if ($t[0] == '-') $filename[0] = substr($t, 1);                
+            }
             $filename = implode('_', $filename);
             return $filename;
         }