I'm playing around with the Connect To Folder feature and I first made a test folder and connected to it in Calibre. Immediately Calibre made a subfolder called "calibre" with all the magazines in my News category synced there. I was not expecting this but was pleasantly surprised. I was able to sync the rest of my books to the parent folder I selected (see image below).
After doing this test run I made a fresh folder in my Dropbox to sync to that. However, Calibre didn't sync my News items nor create the 'calibre' subfolder this second time.
I'm just trying to figure out, is there something I accidentally did/have to do to turn that on?
Is there any way to get other groups of books to sync into their own subfolder like it did with News magazines so I can maintain some physical organization when I open the folders in my iPhone Dropbox app instead of a flat list of books or authors? (like one folder per genre or rating)
Here is an image showing what Calibre did the first time:

and the second time (not nested):