Any plans to buy a new scale?
If you do, keep in mind that your weight may be very off from your last scale (especially since your last scale was probably close to breaking the last time you weighed yourself on it). You should take your weight the first time you weigh yourself on your new scale as your "true" weight - could be more, could be less than last time - and move onward from there. I think it's important for your own sanity to weigh yourself on only one scale, as scales can be off by pounds from each other.
Let us know what happens!