Hello,
I know it's a bit late for my reply but since I confronted the same problem, it might help other users to post this advice:
If you encounter the issue that the tree's column name equals that of the last one, you might have missed to add this column to your table line sample. Also this column's name should be used in the .htm file for the "nodeTextColumn" property of your config tree! For example you might use NODE_NAME for both in order to display the node's name and hence putting "name" as column header as well!
Regards,
Thomas