Doesn't sound outta wack to me. A breastfeeding mom needs around ###-###-#### calories MORE a day than a non-breastfeeding mom. I would try upping your protein intake as your body will burn the carbs faster, I think that's how it goes. I try to keep a trail mix with lots of almonds in my desk for that mid-morning snack attack.
Sounds like your pumping is going well, that's about my output, too, a day. Just remember to stay hydrated, sometimes it's not food your body's wanting, but water.
L.-re weight loss. If you keep breastfeeding it will come off, but you don't want it to drop off too fast. I went from 170 pre-preg, to 200 at delivery, and now after 10 months I'm down to 150. It will happen, just eat healthy and don't cave into the junk food/over-processed food.