The test is attached:

1) run the test and see 2 TreeView
2) click on the treeView1 (left), a listener is waked up and it adds an item (ti) into the treeView2, and asks the treeView2 to select the new item. ti is selected, great.
3) click again on the treeView1, the listener removes the ti
4) click again on the treeView1, the listener adds again ti to the treeView2, but this time ti is not selected, even the listener has asked the treeView2 to select ti.

Repeat clicking and ti is never selected.