As far as the Clip+ is concerned, what is difference between an audiobook and a podcast?
In the audiobook selection, you will have the Chapter Mode option. This allows you to select whether the forward / reverse buttons will skip to the next file. The audiobook folder will also be used specifically for books from Audible , offering different function of the chapter mode.
Audible files have specific chapter breaks integrated into the file, making navigation throughout each book part easier.
You can manually change the genre of your downloaded podcasts or audiobooks to try locating your files in each respective mode. The controls function slightly different between each mode, with the promary difference being the chapter function.