Problem with voronoi offset

Hi I am trying to offset a voronoi pattern in different directions for the different faces of my shape which is a cube. For the horizontal faces it works fine but for the vertical it offsets in the wrong direction. Also I would like to only offset the voronoi only and not the actual edge curves of the cube. I am not sure how to go about achieving this. Please find attach my working documents. Any help or assistance would very appreciated!! Thank you!!