Plane moving when scale slider is used for GAME view...

I wanted to create a grid structure using a 3D plane with a grid texture on it.
Now when moving the scale slider in the editor for the game view is also moving the 3D plane object. (see video) You can see this by the changing transform data. In the video I only use the SCALE slider in the Game Window.

Can someone please explain why this is happening and how to solve this?

Thanks for your help.

Here is the video: http://www.colordefense.de/img/GroundPlane.mov

I did find the problem: I had a script active for moving around selected objects and because the ray still is working when using the slider outside the screen boundaries in the editor the plane seems to be moved. Strange because the ray is working outside the game scene boundaries but I think that seems to be “normal”, right?