346 in feb to 293 today reaching a walweight loss

Back in feb of 2012 i weighed in at 346lbs and now to day june 3 i am at 293lbs and feeling like i am at a wall.
Even though back in mid may i began Les Mill Pump and have loss an inch on each arm and i believe three around my chest. As well as this week i began going to the gym and getting on the tredmill for and hour on a high incline at 3.5 mph i wont stop until i have burned 1000 calories, this plus the fact i started walking a mile to work 5 times a week is leaving me confused. I weighed in last saturday at 290lbs so how did i gain almost four pounds if i uped my calorie burn to over 2000 per day and keep my normal calorie intake.
I feel i should be losing that per week.
Anyone have any input on what i can do to start the weigh loss again i still have over 100lbs to go



If I could also get some friends for accountability that would be great

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