Folders upload as galleries not folders
I'm a new user, uploading a large number of photos from a local drive. The photos are in folders, some folder names are year-month-day names and others are by subject. Some of them have sub-folders and some do not.
When I upload the folders, the folders that do not have sub-folders appear as galleries, not folders. The folders that have subfolders appear as folders and subfolders, as expected. The problem is that the Photo Organizer lists the folders first, followed by the Galleries. So I don't see a continuous list sorted by name. For example a folder called 2019_6_20 is followed by a whole series of folders, but the Gallery named 2019_6_21 is way down on the list, out of sight. So I don't see everything in the order I need.
Is there a workaround for this, besides some manual tedious process to manipulate the contents of all the local folder?