title: Why does the row at the bottom of my outline view get deleted when I click the remove button rather than the one that is selected?
body: <p>When I select a row in my outline view (connected to a NSTreeController) and click the remove button it doesn't delete the row that I have selected but actually deletes the row at the bottom of the table.
  For some more information here is my Connections for the Button:</p>
  
  <p><a href="http://snapplr.com/t1hm" rel="nofollow noreferrer">http://snapplr.com/t1hm</a></p>
  
  <p>and the Entity model:</p>
  
  <p><a href="http://snapplr.com/k6n3" rel="nofollow noreferrer">http://snapplr.com/k6n3</a></p>
  
  <p>If you need more info feel free to comment.</p>