I've decided to change it a bit:

Secondary Cakes. Three types of stories go in this folder:
- Stories where the Cakes appear as secondary characters but the main character is somepony other than Pinkie.
- Stories that contain both Pinkie and the Cakes, but the plot focuses on Pinkie and other ponies. Example: Cupcakes, Chaos and Crushes.
- Collections of short stories where at least one of them is about the Cakes. Example: Mingled Days

Which means some of the stories will be relocated. I don't know if you will be notified (sometimes I still don't understand how some things in the site work).

Anyway, if you have any doubt or questions, you know where I am.