The arrangement of my files in Desktop mysteriously changed from the way I always had it and the way the other sidebar folders are arranged. I understand sorting by title, kind, date last opened or modified, size. No matter how I sort, the items are grouped in Yesterday, Previous 30 Days, list of months--most recent to oldest. I want all the items arranged by one of the headings, not arranged within date blocks. I've selected View for Desktop and the other sidebar folders, but cannot see a difference in the choices.