I recently started using fluxbox, I'm using Lightdm as a desktop manager and was using gnome/unity before fluxbox.

I'm facing a few troubles while trying to adapt to this new window manager, the first one (and slightly odd) is this one:

Everytime I try to open Nautilus, the background changes to my unity ubuntu's background and when I right click on desktop's background (to reload fluxbox which was my first try to fix the problem) a unity folder options menu pops up (the one "New Folder", "Paste" etc. options ).

There's another thing that I'm not really sure about:
Is it ok that I use Lightdm just for the login screen? I simply change the window manager there to fluxbox and log in my computer normally with fluxbox.

Thanks in advance.