In elevations, or sections, you dragged the bottom of them upwars, so the top of the View Cut Plane setting no longer touches them on those floors. You need to drag the bottom back down below the lowest floor level, then in that section or elevation, one by one click on a grid line, and at the bottom, there will be a small blue 3D. Click on that to change it to 2D. After doing this to all visible, then you can drag the bottoms back up in that view.