Is it possible that the Orbera Balloon moves inside the stomach to a position where it's not being effective?

Hi,
The balloon is free-moving in the stomach, so the actual location will change continuously, based on your position and activity. That shouldn't affect it's effectiveness. While it is not uncommon to have a 2nd balloon placed, there are no studies to guide the results that occur in this scenario, and I suspect that your body is just "used" to the balloon being there, so you may not have the same benefit as the first time. 

The position of Balloon I not really important for its effectiveness. The balloon will actually move freely and food passes by it slowly.
The actual mechanism of action is probably more complicated. But if it’s not working, then you may want to try a surgical option.

Helllo,The position of the balloon is not important. What you can check if the surgeon who did it this time filled the balloon to the same degree. You may have hit the plateau, which is common after a few weeks of dieting, so you need to rethink how you are doing things - smaller portions, more water, more physical activity. Endoscopic gastric sleeve could be your option if nothing else works. But with any above method, none of them are magic pills, you still need to modify food and water intake and exercise. Good luck.