kneeboard not showing properly on some planes

[skypickle]

I have a monitor config that looks like this:

 

My lua file named 'camera + 2MFCDs' looks like this:

--3840 x 2680       3840 screen with 1920 screen below it
_  = function(p) return p; end;
name = _('Camera + 2 MFCDs');
Description = '2 MFCDs on the right and camera on the left'
Viewports =
{
     Center =
     {
          x = 0;
          y = 0;
          width  = 3840;
          height = 1600;
          viewDx = 0;
          viewDy = 0;
          aspect = 3840 / 1600;
     }
}

LEFT_MFCD =
{
     x = 20;
     y = 1600 + 200;
     width = 830;
     height = 830;
}
RIGHT_MFCD =
{
     x = 1080;
     y = 1600 + 200;
     width = 830;
     height = 830;
}

JF17_LEFT_MFCD =
{
x = 20;
y = 1600 + 200;
width = 830;
height = 1106;
}

JF17_RIGHT_MFCD =
{
x = 1080;
y = 1600 + 200;
width = 830;
height = 1106;
} 

GUI = 
{
      x = 0;
      y = 0;
      width = 3840;
      height = 1600;
}

UIMainView = GUI
GU_MAIN_VIEWPORT = Viewports.Center

The stock planes show the kneeboard properly at the bottom right of the the main GUI (monitor 2)

The A4e, The hercules and the T45 all show the kneeboard spanning monitor 2 and monitor 4 like so:

The red line demarcates the boundary between monitor 2 monitor 4. In the A4e I see this:

 

same w T45.

 

Can anyone help me understand why the the kneeboard spills over into monitor 4 only with the add on free mods?