Everything on my desktop appears in my pictures folder

For some reason, seemingly out of nowhere, everything I put on my desktop appears also as a duplicate in My Pictures folder. These duplicates are not copies; what you do to them affects their desktop counterparts. This means I cannot move, rename, or delete them without the desktop files being affected. It's as though my Desktop were somehow linked to that folder. Can anyone tell me what I did or how to undo it?
Thanks.

 

Ignore. I fixed it.