Try putting those files in a Folder instead on your desktop. Than create a Portal Fences to that folder instead. This will ensure that the files in the folder will always be in that folder. Unless you deleted it.
Normal Fences is for your desktop shortcut icons. More for you launcher etc. For documents and files it is best to use the Portal Fences.
I am not sure how those file you use for all your printers work. But I do know that Ms Office document do like to jump out of a Fence. This is due to how Office file work. When you edit a file, For example, a Word document. It will create a temporary working file while you work on it. When you done. It will delete off your old document and rename that temp file to that old document. Fence when it see that old document being delete. It consider it was remove from the Fence. Even the new file name the same as the old one. It will still consider as a new document. It will not auto move it back to that original location. So, I might also assume it will also happen to any other files which might gone through similar process when updates itself.
Hope that explain it.
Stardock Community Assistant