A pound a day? Unlikely. ;) That's hard for just about anyone. Remember that it's important to set reasonable goals. If your ticker is correct, then you can reasonably expect to lose 1-2 pounds a week.
The thing is, no matter how much exercise you do, you can't out-exercise a poor diet. If you've gained weight, it's not because you're not working out enough, it's because you're eating too much.
Instead of dieting to get the weight off, try starting on the path to a healthy lifestyle for LIFE. The reason so many people regain weight after losing it is that they did a short-term diet change. Not a long-term life change. By making slow, easy to maintain healthy choices, you teach yourself new habits, so that when you reach your goal weight, nothing really changes at all!
Here's a great place to start to learn about all that:
Stop Dieting and Start Living! www.sparkpeople.com/resource/motivation_ar
All that exercising isn't sustainable in the long term. What you need to do is decide how much exercise you can maintain for the rest of your life, and adjust your calorie intake to account for that. Adjust your diet to your exercise... not the other way around.