Finder shows me filenames and folder in inverted order. Why?

Question

OS X is showing me some folder and filenames, per default in reverse alphabetical order. Why?

Answer 1

If you take a close look at your Finder bar, you'll see a little triangle that is to the right of "Name" (which is just above the file names).
Click it, Finder will order your files alphabetically and Finder will remember your choice. By so, it will display the list in alphabetic order next time you open a Finder window.