added more to workout and gaining weight???

same has happened to me for the last two weeks I have really amped up my workouts (for me anyhow)
and been logging great, b ut hve gone up in weight . . . I don't think it's necessarily muscle just yet - it's only been two weeks, but do think its the muscles holding water because they are recovering from the new strain/workouts

"Strenuous exercise leads to structural damage to muscle cells which causes calcium to leak out of the muscle. This causes the activation of enzymes that breaks down cellular proteins in the muscle. These proteins then cause an inflammatory response by the immune system which then leads to edema (water retention at the site of injury) and pain."

so essentially like I said... recovering muscles will retain some water.

If you are eating on plan, you really have to ignore the fluctuations on the scale when you change your exercise level. It may even stay up there for a bit while your body adapts to the exercise. If it helps, get out the tape measure and measure your waist and prove to yourself you aren't getting bigger, no matter what the scale says.

Eat more to compensate. Sounds stupid, but it works. Good luck!
And muscle takes up less MASS than fat. A pound of feathers still equals a pound of pennies. Check your measurements as well as the scale.

Just give your body time to respond. You may not have gained a full 2 pounds. It's normal for body weight to fluctuate by several pounds a day depending upon fluid shifts in your body and the time at which you weigh yourself.
Some people believe that people gain weight from exercise because they are building more muscle mass. In your case, this is unlikely. You can't build much muscle doing cardio. And even if you were lifting heavy weights, it would be very difficult to gain 2 pounds of muscle in three weeks.