Congratulations. I don t think that you are doing anything wrong, so long as you don t just stop all your excersizing once you have reached your target. I think such guidelines are put in place to ward off crazy dieters as opposed to something people should worry about if they are losing weight in a sensible way, just like you are.
As long as your getting the appropriate types of food, you should be fine. There s nothing wrong with losing a lot of weight quickly for a little while, as long as you re getting the right vitamins, minerals and enough calories. Generally it s not healthy to lose that much weight that quickly, but different people react differently to exercise and dieting. You sound fine to me, but if you are really concerned just consult your doctor.
it sounds like you are doing everything great, i think it should be fine you will Plato soon and not lose anymore weight unless you were really over weight , or you are just doing it the get healthy? muscle weighs more that fat so don t be mad we you stop losing weight , just inches:)