you should not be able to select objects on a layer that is

[Applefamily]

you should not be able to select objects on a layer that is not visible. I was playing with layer turning off one layer to modify another. When I turned back on the hidden layer things had moved.

[Sweetness4713]

Did you make sure you closed the lock beside the eye.. If you had you should be able to move the other layer

[Applefamily]

I see the lock now. By default it should lock all nonvisable layers. In my opinion.