Q: Aperture is suddenly giving me problems with exporting photos.

When I choose a destination, then create a new folder, it doesn't put the new folder in the specified main folder. Specifically, I'm wanting to export photos to my external hard drive, creating new sub-folders within designated main folders. I've been doing this for years, then suddenly today it will not do that.  It just places the new folder I created in the external hard drive as a new main folder. Very annoying, and causing several extra steps in my already crowded workflow. Thanks in advance for any advice or help!