Whenever I select one ore more document(s) in the tree, the program tells me that I have selected one in addition (namely the one under the last that I indeed selected).
Here are two examples:
a) I have selected one document (= the one with blue background), but the programm tells me that two were selected:
![Image](http://abload.de/thumb/select1dws3i.jpg)
b) I have selected four documents, but the programm tells me that five were selected:
![Image](http://abload.de/thumb/select2wsl3y.jpg)
This issue is not of mere theoretical but of big practical importance:
Whatever I make with the selected documents affects also the "additional" one. E.g. when I want to delete 4 "really" selected documents, a 5th document will be deleted too!