When using resolume with a midi controller you assign essential controls such as opacity of the layer and speed to midi buttons. They are then assigned to layers 1, 2, 3 and Active.
However when you switch the order of the layers (for instance placing 2 above 1), your midi controller does not correspond to the layer order on the screen.
A simple solution would be to place numbers next to layers (1, 2, 3) so that when you change the order you still know which midi controls correspond. I hope this simple solution can be implemented in the next version.