This may not be a bug at all as much as simply a really minor issue. When using the Disc Layout Editor, if you create a new folder named, for example, Zero and then create another folder named, for example, Alpha, the folders will be sorted alphabetically in the left panel but not in the right one. Even if you go into a folder, when you return to Root the folders in the right panel will be listed in the creation order, not alphabetically. Same goes for files/folders dragged into the DLE.
As I said, this is just a minor issue and, might as well be supposed to be like that?.