My old scale has been lying to me, I was sure enough of it that I went out and bought a new scale. Tried one out in the store and it told me a number I beleived then just grabbed one in a box and took it home. Then of course I tried it out and it gave me a number that I had a little trouble accepting, it was 60 pounds away from the other scale so obviously they were both confused. So I went around the house and grabbed things of known weight (weights, handy that way) and piled them onto the scales to do a little math. Scale 1 was just plain broken, and not in a useful way, it'd be out any which direction that it felt like at different points. Scale two was also wrong, but in a much more interesting manner. It's wrong consistently, in fact it's wrong by exactly the difference between a two pound kilogram and a kilogram here on earth at sea level.