I too, was addicted to the scale weighing. I had to make a decision to weigh myself once a week and only on the same scale. Scales, like clocks, tend to show different numbers. Either its not balanced, or the surface, its on, is slanted.. who knows.
Don't pay attention to scales that aren't the ones you normally weigh on. The point is to notice the differences in weighings on the same scale. A two pound loss is a two pound loss.
Good luck to all of you... and for me too!