title: File is not sort after sort
body: <p>I have a problem with sorting my file. My file look like this</p>
  
  <p><code>geom-10-11.com 1
  geom-1-10.com 9
  geom-1-11.com 10
  geom-1-2.com 1
  geom-1-3.com 2
  geom-1-4.com 3
  geom-1-5.com 4
  geom-1-6.com 5
  geom-1-7.com 6
  geom-1-8.com 7
  geom-1-9.com 8
  geom-2-10.com 8
  geom-2-11.com 9
  geom-2-3.com 1
  geom-2-4.com 2
  geom-2-5.com 3
  geom-2-6.com 4
  geom-2-7.com 5
  geom-2-8.com 6
  geom-2-9.com 7
  geom-3-10.com 7
  geom-3-11.com 8
  geom-3-4.com 1
  geom-3-5.com 2
  geom-3-6.com 3
  geom-3-7.com 4
  geom-3-8.com 5
  geom-3-9.com 6
  geom-4-10.com 6
  geom-4-11.com 7
  geom-4-5.com 1
  geom-4-6.com 2
  geom-4-7.com 3
  geom-4-8.com 4
  geom-4-9.com 5
  geom-5-10.com 5
  geom-5-11.com 6
  geom-5-6.com 1
  geom-5-7.com 2
  geom-5-8.com 3
  geom-5-9.com 4
  geom-6-10.com 4
  geom-6-11.com 5
  geom-6-7.com 1
  geom-6-8.com 2
  geom-6-9.com 3
  geom-7-10.com 3
  geom-7-11.com 4
  geom-7-8.com 1
  geom-7-9.com 2
  geom-8-10.com 2
  geom-8-11.com 3
  geom-8-9.com 1
  geom-9-10.com 1
  geom-9-11.com 2
  </code></p>
  
  <p>So I used <code>sort -k1.6 -k2 -n</code> and I got</p>
  
  <p><code>geom-1-2.com 1
  geom-1-3.com 2
  geom-1-4.com 3
  geom-1-5.com 4
  geom-1-6.com 5
  geom-1-7.com 6
  geom-1-8.com 7
  geom-1-9.com 8
  geom-1-10.com 9
  geom-1-11.com 10
  geom-2-3.com 1
  geom-2-4.com 2
  geom-2-5.com 3
  geom-2-6.com 4
  geom-2-7.com 5
  geom-2-8.com 6
  geom-2-9.com 7
  geom-2-10.com 8
  geom-2-11.com 9
  geom-3-4.com 1
  geom-3-5.com 2
  geom-3-6.com 3
  geom-3-7.com 4
  geom-3-8.com 5
  geom-3-9.com 6
  geom-3-10.com 7
  geom-3-11.com 8
  geom-4-5.com 1
  geom-4-6.com 2
  geom-4-7.com 3
  geom-4-8.com 4
  geom-4-9.com 5
  geom-4-10.com 6
  geom-4-11.com 7
  geom-5-6.com 1
  geom-5-7.com 2
  geom-5-8.com 3
  geom-5-9.com 4
  geom-5-10.com 5
  geom-5-11.com 6
  geom-6-7.com 1
  geom-6-8.com 2
  geom-6-9.com 3
  geom-6-10.com 4
  geom-6-11.com 5
  geom-7-8.com 1
  geom-7-9.com 2
  geom-7-10.com 3
  geom-7-11.com 4
  geom-8-9.com 1
  geom-8-10.com 2
  geom-8-11.com 3
  geom-9-10.com 1
  geom-9-11.com 2
  geom-10-11.com 1</code></p>
  
  <p><strong>But when I tried use</strong> <code>uniq -f1</code> <strong>or</strong> <code>sort -k1.6 -k2 -n -u</code> <strong>I got same long sorted output. So I used</strong> 
  <code>sort -k1.6 -k2 -n -c</code>
  <strong>and get message that this file is disordered</strong> </p>
  
  <p>(<code>sort: glist2:2: disorder: geom-1-2.com 1</code>).</p>
  
  <p>I tried use just <code>sort -k2 -n -u</code> but got </p>
  
  <p><code>geom-10-11.com 1
  geom-1-3.com 2
  geom-1-4.com 3
  geom-1-5.com 4
  geom-1-6.com 5
  geom-1-7.com 6
  geom-1-8.com 7
  geom-1-9.com 8
  geom-1-10.com 9
  geom-1-11.com 10
  </code></p>
  
  <p>That is not what I need, I need to have </p>
  
  <p><code>geom-1-2.com 1
  geom-1-3.com 2
  geom-1-4.com 3
  geom-1-5.com 4
  geom-1-6.com 5
  geom-1-7.com 6
  geom-1-8.com 7
  geom-1-9.com 8
  geom-1-10.com 9
  geom-1-11.com 10
  </code></p>
  
  <p>So I need to have at begening geom-1-X and not geom-10-X. It would be great use juste uniq because I have more bigger files with more geometries (about thousands of lines) but with same structure. Thank you for your answers.</p>