What is wrong with you is that this is an old sticking point for you.
Many of us find we have to muscle our way through old sticking points. Whether it's mental or physical, it doesn't matter. It's very real.
I'm telling you...this is where my one-year-commitment to my plan paid off. My old sticking point was 35 pounds. I'd lose that much and then decide one day that it was too hard for such a tiny (ha!) loss, so I'd give up and gain it all back plus a few. This time I decided there was no more of that. Where would I be in a one year's time if I did not give up? How many plateaus could I power through if I was in it for one year. It's been almost 10 months and nearly 70 pounds.
I'm pretty happy with my experiment.
You have to have patience with the scale. That's all there is to it. Honest-to-Pete it's the truth. The scale is a fickle, fickle friend.