If that "Folder" file which is showing doesn't have an extension, please rename it to Folder.jpg and see whether it makes a difference.
The file extension, .jpg, was hidden by Windows 7 default "folder view" for common file extensions, so that's not an issue.
Thus, suppose there's track data in your Anne-Sophie folder (I can't see that), things will go wrong because you also have album folders in that same folder.
There is nothing in the Anne-Sophie folder. That folder is the "Artist" folder created when I ripped the cd with dbpoweramp.
With such a structure, I can imagine that things are not in "balance" somehow, and at (me) working through the structure, unexpected things happen.
I'm not sure what you mean here. Whenever I rip a cd, I secure rip with dbpoweramp. The cover art automatically is placed in the folder with the tracks. Is there another way to do this?
This also happens if I try to leave that directory by typing an artist's name with the keyboard.
I don't think that can happen (the "leaving"). So, that it goes wrong I sure believe, but this must always be something in the chosen folder folder itself.
That's not the way it works here. If I just type on the keyboard "Bob" from the directory as shown below, it automatically leaves all four subdirectories (Johann/Ann-Sohie/Bach/ and Classical) and goes to the Bob Dylan Directory. I don't type anything in the search box. That's the way I've been doing it from the beginning.