I'm going crazy. example: I have three layers layer 3 layer 2 layer 1 From the layers menu I select layer 1 (which is below layer 2 and 3) and when I want to move it with the move tool, layer 3 moves, I have to hide layers 2 and 3 to be able to move layer 1, no I know if this can be deactivated since this did not happen to me before.
I'm not exactly sure whether you are trying to move the order of the layers in the layers panel, or whether after selecting a layer in the layer panel you click in the image and try to move the position of a layer.
If you are having a problem moving the lowest layer in the panel, make sure it is not a background layer which cannot be moved until you convert it to a normal layer (with a double-click).
If you are having a problem selecting a layer in the image window, try changing your options for the move tool in the tool bin.