How can I stop documents from popping out of folders littering the desktop? I have a MacBook Pro, early 2015. I work on a number of projects at a given time. Each desktop folder is labeled by client and I probably have 10 folders with 2-7 subfolders. I save documents to folders via the "save" function or by drop and drag on the desktop. Several mornings a week when I open my computer, 8-15 documents have "popped out" and are all over the desktop. 

How can I make them stay put?
I would create the necessary folders in your documents directory or relevant location and use aliases on the desktop to drag / drop your files on as you wish.

It is not good practise to store things directly on the desktop - it requires more memory when it goes to sleep etc