Hello, I use the old LR 5.7 and, often, if I don't wish to export to another program I will simply Control/Shift/E and usually the photo is saved in the same folder as the original. Perfect.
All of a sudden, when I do as described above, it creates in my "My Pictures" a new folder entitled "2015". No idea why or how this happened or where it is originating from but I don't like it. A little thing, but still...
"MOVE and ADD" have nothing to do with Exporting! So what exactly did you change?
[Ctrl + Shift + E] will Export selected file/s using the 'last used' Export dialog, so if you have changed the dialog, or used another Export Preset, then the changes will be the settings used by the keyboard shortcut.
And the location, including any sub-folder, for the Exports is set in the Dialog: It pays to check the options here frequently!