Annoying "double" panel Ubuntu11.10

Recently I've upgraded my box from Ubuntu 10.04 to 11.10 and after that I lost my panel settings for dual screen.
Below is step-by-step way of moving a panel to another screen:

1. Right-click the panel you wish to move and select “Properties”.
2. Uncheck the “Expand” option under the “General” tab.
3. Grab one of the edges of the panel by clicking on the left or right end (top or bottom end for vertical panels).
4. Drag the bar to the desired screen and position.
5. Check the “Expand” option in the “Panel Properties” window and click “Close”.