Had no idea how to search for this. After I import images from my camera onto the computer, the folder that I import to is not stacking properly in the Library. Was never an issue until recently, and haven't changed any settings that I am aware of. Usually, the import folder nests correctly in the Library menu, such that the Library folder system is a mirror image of my disc drive folder system. Now, the import folder is showing up as a top-level folder instead of nested where it is supposed to be.