cannot add items to folder

We have had a few requests for adding the ability to add items to a folder from within the folder itself. This is something that is being discussed among the development team. In the meantime, you can add items to a folder by navigating to the item in the category list, tapping on the item, and then tapping the folder button in the action bar. This should bring up the set folder interface where you should be able to select the folder that you want to add the item to. If this still isn't working for you or if you have any other questions, let me know.