diff --git a/src/ui/Forms/JoinSubtitles.cs b/src/ui/Forms/JoinSubtitles.cs
index 9035c0988..f78641c14 100644
--- a/src/ui/Forms/JoinSubtitles.cs
+++ b/src/ui/Forms/JoinSubtitles.cs
@@ -3,11 +3,11 @@ using Nikse.SubtitleEdit.Core.SubtitleFormats;
 using Nikse.SubtitleEdit.Logic;
 using System;
 using System.Collections.Generic;
-using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
+using Nikse.SubtitleEdit.Core.Enums;
 using MessageBox = Nikse.SubtitleEdit.Forms.SeMsgBox.MessageBox;
 
 namespace Nikse.SubtitleEdit.Forms
@@ -94,13 +94,14 @@ namespace Nikse.SubtitleEdit.Forms
         private void listViewParts_DragDrop(object sender, DragEventArgs e)
         {
             var files = (string[])e.Data.GetData(DataFormats.FileDrop);
-            foreach (string fileName in files)
+            foreach (var fileName in files)
             {
                 if (!_fileNamesToJoin.Any(file => file.Equals(fileName, StringComparison.OrdinalIgnoreCase)))
                 {
                     _fileNamesToJoin.Add(fileName);
                 }
             }
+
             SortAndLoad();
         }
 
@@ -266,21 +267,16 @@ namespace Nikse.SubtitleEdit.Forms
 
             if (!radioButtonJoinAddTime.Checked)
             {
-                for (int outer = 0; outer < subtitles.Count; outer++)
+                for (var outer = 0; outer < subtitles.Count; outer++)
                 {
-                    for (int inner = 1; inner < subtitles.Count; inner++)
+                    for (var inner = 1; inner < subtitles.Count; inner++)
                     {
                         var a = subtitles[inner - 1];
                         var b = subtitles[inner];
                         if (a.Paragraphs.Count > 0 && b.Paragraphs.Count > 0 && a.Paragraphs[0].StartTime.TotalMilliseconds > b.Paragraphs[0].StartTime.TotalMilliseconds)
                         {
-                            var t1 = _fileNamesToJoin[inner - 1];
-                            _fileNamesToJoin[inner - 1] = _fileNamesToJoin[inner];
-                            _fileNamesToJoin[inner] = t1;
-
-                            var t2 = subtitles[inner - 1];
-                            subtitles[inner - 1] = subtitles[inner];
-                            subtitles[inner] = t2;
+                            (_fileNamesToJoin[inner - 1], _fileNamesToJoin[inner]) = (_fileNamesToJoin[inner], _fileNamesToJoin[inner - 1]);
+                            (subtitles[inner - 1], subtitles[inner]) = (subtitles[inner], subtitles[inner - 1]);
                         }
                     }
                 }
@@ -331,6 +327,11 @@ namespace Nikse.SubtitleEdit.Forms
                 }
             }
 
+            if (radioButtonJoinPlain.Checked)
+            {
+                JoinedSubtitle.Sort(SubtitleSortCriteria.StartTime);
+            }
+
             JoinedSubtitle.Renumber();
             labelTotalLines.Text = string.Format(LanguageSettings.Current.JoinSubtitles.TotalNumberOfLinesX, JoinedSubtitle.Paragraphs.Count);
         }
diff --git a/src/ui/Logic/ListViewSorter.cs b/src/ui/Logic/ListViewSorter.cs
index c56b210f5..88c6de482 100644
--- a/src/ui/Logic/ListViewSorter.cs
+++ b/src/ui/Logic/ListViewSorter.cs
@@ -1,6 +1,8 @@
 using Nikse.SubtitleEdit.Core.Common;
 using System;
+using System.Collections.Generic;
 using System.Globalization;
+using System.Linq;
 using System.Text.RegularExpressions;
 using System.Windows.Forms;
 
@@ -13,6 +15,7 @@ namespace Nikse.SubtitleEdit.Logic
         public bool IsDisplayFileSize { get; set; }
         public bool Descending { get; set; }
 
+        private readonly Regex _numbers = new Regex(@"\d+", RegexOptions.Compiled);
         private readonly Regex _invariantNumber = new Regex(@"\d+\.{1,2}", RegexOptions.Compiled);
 
         public int Compare(object o1, object o2)
@@ -32,7 +35,7 @@ namespace Nikse.SubtitleEdit.Logic
                 var s1 = lvi1.SubItems[ColumnNumber].Text;
                 var s2 = lvi2.SubItems[ColumnNumber].Text;
 
-                if (_invariantNumber.IsMatch(s1) && _invariantNumber.IsMatch(s2) && 
+                if (_invariantNumber.IsMatch(s1) && _invariantNumber.IsMatch(s2) &&
                     int.TryParse(s1, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out var i1) &&
                     int.TryParse(s2, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out var i2))
                 {
@@ -53,7 +56,10 @@ namespace Nikse.SubtitleEdit.Logic
                 return i1 > i2 ? 1 : i1 == i2 ? 0 : -1;
             }
 
-            return string.Compare(lvi2.SubItems[ColumnNumber].Text, lvi1.SubItems[ColumnNumber].Text, StringComparison.Ordinal);
+            // use natural sort order
+            var str2 = _numbers.Replace(lvi2.SubItems[ColumnNumber].Text, m => m.Value.PadLeft(10, '0')).RemoveChar(' ');
+            var str1 = _numbers.Replace(lvi1.SubItems[ColumnNumber].Text, m => m.Value.PadLeft(10, '0')).RemoveChar(' ');
+            return string.Compare(str2, str1, StringComparison.Ordinal);
         }
     }
 }