Going from "obese" to "overweight" is a huge accomplishment! We are cherish those moments. So regardless of the 4 lbs or not, still AWESOME! However..... Do not pay too much attention to those BMI calculators... There are a lot of things they do not take into consideration when calculating them... It's nice to use an inspiration tool, like you going from obese to overweight, but don't worry about what it says too much...
They tend to lie to you...
But I'm still going to jump for joy in about 3 lbs when I'm "normal" instead of overweight! So I know how you feel!!!!!