Window 7, Emacs 25.1, Dired+ mode.
Path: d:\temp\test\test2\test3\
In folder test3 has 3 files: file1.txt, file2.txt, file3.txt.
When I am in folder test3 and click on two dots I'm up to one level (go to folder test2). OK.
But when I click on one dot (see picture) the cursor go to on file file1.txt.

1.Is this a correct behavior?
2.What mean one dot in dired mode?
mouse-1ormouse-2on.in Dired after loading Dired+ does not move the cursor to the first file name or anywhere else. What it does isdired-mouse-find-file-other-window, which means that it visits the same directory in another window. If you see the cursor movement you describe then that's probably caused by something else in your init file. What doesC-h ktell you when you click.? - Drew