I just imported 500 notes and see that the structure has separated all of the notes in various nested folders, but not in any logical order. I see these folders "0, 1, 2, 3…a, b, c…, but there doesn’t seem to be any logical order for how my rtf notes were arranged. They’re all split up into various folders, but not alphabetically. How does DT arrange imported notes?
What you are seeing is the internal database structure of DT. See my answer here.
Edit: Updated wrong link.