I have also been stuck since exercising. I started exercising after 4 months (and 30 lbs) of weight loss - I didn't do ANY exercise before then.
Then I started exercising, lost about 8 more lbs, but it took 2 months. Then for the next 2 months, I've lost NOTHING and can't seem to no matter what I try.
They switched me from gold to blue when I told them what I was doing, but haven't lost a thing on blue - it is VERY frustrating