I made a tree view with some grouped cells. by default its collapsed. when i select a cell below the collapsed (grouped cell with arrow sign) and then i expand the collapsed cell(TreeItem) I saw the another cell was selected from grouped cells. as well as outer, first selected cell was still selected.
more details can be get from this link http://stackoverflow.com/questions/26174275/javafx-2-strange-behavior-in-tree-view-when-expanding-and-collapsing-possible