I can't believe how many people allow themselves to be filled with so much stress and misery over stupid numbers on their scale. Remember, some software engineer programmed that thing based on a whole bunch of assumptions. I've seen the quality control on mission-critical software and it's not that great so you can imagine how much QA they do on something like a bathroom scale.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Current squat: 162.5 x 2