I think I may have discovered one workaround to the problem with moving to another space when closing Blender. If I do not have any other applications open on that space when I close Blender, then am yanked to Space 2. If I do have another application open, say the terminal, then I am not yanked away when I close Blender. So, I can prevent the behavior simply by opening a terminal on that space. However, I should not have to do this because other applications do not initiate a Space jump when closing the last window.
Also, I have not found a work around for the fact that I was being yanked back to the space with blender during a long render.