Banded August 2012 & only lossed 30 lbs.

Okay, let me begin by saying Hello. I was banded in 2006 - pre weight 287, in 18 months in lossed 120 lbs. Maintained 167 lbs for 4 yrs. Then my esophagus became enlarged and in Jan 2011, my doctor removed all my Fluid and I regained 63 lbs. over the next year. So in Aug 2012, I had a revision to VSG. and it has been 9 months and I have lossed 30 lbs. I know I should have lossed more. I was told since I had the band that the weight loss would be slower, but I feel I should have lost more than 30 lbs. This month I have had labwork and seen my doctor last week and he told me to give it time. But when I look at others in 6 months they have lossed 80 to 90 lbs. This is starting to be frustrating. And I go to the gym 3 times a week and walk 30 mins at least twice a week. And I am not sure whats going on. Have anyone experience this with having a revision?

What am I doing wrong and how can I fix the situation?

Please Help!!!!!!!!!