The scales stay the same sometimes, out of nowhere they drop and very often it keeps going down for a few days. I believe when fat cells empty, they temporarily fill with water, when it goes is when you see the drop on the scales.
That usually happens for me after I let myself go a bit. I hadn't lost weight for a month before Christmas, I relaxed for a few days, put on 5 lbs in water weight and now a week into the new year, i'm 7lbs lighter than before Christmas! Weird how it happens like that.