What you may be saying to yourself right now is: "but you don't understand! I lost 25 of those pounds during the first 2 weeks!"
The thing is, the body likes losing slow and steady. When you drop more than an average amount (say, 1-2lbs a week)... a LOT of your losses are water. Water comes and goes, and can play havoc with the scale.
For example, let's say you DID see a 25 pound shift on the scale over the first 2 weeks. Sorry, it wasn't 25lbs of FAT. A good chunk of that was just water (probably 15-20 pounds of it). Over time, your body has cycled through water and fat, and by now, you probably HAVE lost about 37lbs of fat.
It looks like you are 11 weeks out. I had lost 36lbs during the first 11 weeks postop. (I started at 305lbs).
I'm now 8.5 months out and have lost 101lbs. You've just got to give it time. I figure it might take me another 8+ months to get to goal. But who cares? What else am I gonna do?