Mapping of surround pan knobs on Mix/Control

[espron]

Hi,

If you press the pan knob, and then the chan knob I get the pan controls available on the mix, but there are no knobs for Rear L/R.

It maps out like this:

1 Front 2 F/R 3 4 5 Cntr% 6 F Div 7 R Div 8 F/R Div



So, there is in fact two free knobs but no rear L/R control.

Is this a fault with my surface, or is this just how it is mapped? Seems strange to include all the other controls and just leave out rear L/R?