diff --git a/src/com/bytezone/diskbrowser/disk/DiskFactory.java b/src/com/bytezone/diskbrowser/disk/DiskFactory.java
index 5a38cd5..d2a7c77 100755
--- a/src/com/bytezone/diskbrowser/disk/DiskFactory.java
+++ b/src/com/bytezone/diskbrowser/disk/DiskFactory.java
@@ -201,20 +201,6 @@ public class DiskFactory
           return disk;
       }
 
-      if (file.length () == 819200)         // 800K 3.5"
-      {
-        if (debug)
-          System.out.println ("UniDos ?");
-        // 2 x 400k disk images
-        AppleDisk appleDisk1 = new AppleDisk (file, 50, 32);
-        AppleDisk appleDisk2 = new AppleDisk (file, 50, 32, 409600);
-        disk = checkUnidos (appleDisk1, 1);
-        disk2 = checkUnidos (appleDisk2, 2);
-        assert disk != disk2;
-        if (disk != null && disk2 != null)
-          return new DualDosDisk (disk, disk2);
-      }
-
       if (debug)
         System.out.println ("  Checking po or dsk hard drive: " + file.length ());
 
@@ -226,6 +212,19 @@ public class DiskFactory
         return disk;
       }
 
+      if (file.length () == 819200)         // 800K 3.5"
+      {
+        if (debug)
+          System.out.println ("UniDos ?");
+        // 2 x 400k disk images
+        AppleDisk appleDisk1 = new AppleDisk (file, 50, 32);
+        AppleDisk appleDisk2 = new AppleDisk (file, 50, 32, (int) (file.length () / 2));
+        disk = checkUnidos (appleDisk1, 1);
+        disk2 = checkUnidos (appleDisk2, 2);
+        if (disk != null && disk2 != null)
+          return new DualDosDisk (disk, disk2);
+      }
+
       if (debug)
         System.out.println ("  Creating a data disk from bad length");
 
diff --git a/src/com/bytezone/diskbrowser/disk/DualDosDisk.java b/src/com/bytezone/diskbrowser/disk/DualDosDisk.java
index a542fad..4a3a0d2 100755
--- a/src/com/bytezone/diskbrowser/disk/DualDosDisk.java
+++ b/src/com/bytezone/diskbrowser/disk/DualDosDisk.java
@@ -136,6 +136,8 @@ public class DualDosDisk implements FormattedDisk
       currentDisk = 0;
     else if (disks[1] == fd)
       currentDisk = 1;
+    else
+      System.out.println ("Disk not found: " + fd);
   }
 
   // ---------------------------------------------------------------------------------//
diff --git a/src/com/bytezone/diskbrowser/gui/AppleDiskTab.java b/src/com/bytezone/diskbrowser/gui/AppleDiskTab.java
index ff95356..ab92c51 100755
--- a/src/com/bytezone/diskbrowser/gui/AppleDiskTab.java
+++ b/src/com/bytezone/diskbrowser/gui/AppleDiskTab.java
@@ -128,7 +128,7 @@ class AppleDiskTab extends AbstractTab
   {
     DefaultMutableTreeNode rootNode = getRootNode ();
 
-    // check for multi-volume disk
+    // check for multi-volume disk (only search the current branch)
     FormattedDisk fd = ((AppleFileSource) rootNode.getUserObject ()).getFormattedDisk ();
     if (fd instanceof DualDosDisk)
     {
diff --git a/src/com/bytezone/diskbrowser/gui/DataPanel.java b/src/com/bytezone/diskbrowser/gui/DataPanel.java
index 6a4d3a1..fa9d3e4 100755
--- a/src/com/bytezone/diskbrowser/gui/DataPanel.java
+++ b/src/com/bytezone/diskbrowser/gui/DataPanel.java
@@ -250,7 +250,7 @@ class DataPanel extends JTabbedPane
 
     switch (getSelectedIndex ())
     {
-      case 0:             // Formated/Image
+      case 0:             // Formatted/Image
         try
         {
           setText (formattedText, dataSource.getText ());
diff --git a/src/com/bytezone/diskbrowser/gui/TreeBuilder.java b/src/com/bytezone/diskbrowser/gui/TreeBuilder.java
index b8af6ab..cfa108c 100755
--- a/src/com/bytezone/diskbrowser/gui/TreeBuilder.java
+++ b/src/com/bytezone/diskbrowser/gui/TreeBuilder.java
@@ -208,6 +208,8 @@ public class TreeBuilder
 
       File[] files = file.listFiles ();
       if (files != null)
+      {
+        Arrays.sort (files, fileComparator);
         for (File f : files)
         {
           if (f.isHidden ())
@@ -222,6 +224,7 @@ public class TreeBuilder
               f.isDirectory () ? "D" : " ", name, sdf.format (d).replace (".", ""), size,
               type));
         }
+      }
 
       if (text.length () > 0)
         text.deleteCharAt (text.length () - 1);