So, the combination of two screens with a height of 1024 and 1080 pixel is 1024? Dear X server, if you don't stop doing such none sense I'm going to replace you by a Wayland session!

Screen 0: minimum 320 x 200, current 3200 x 1024, maximum 8192 x 8192
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1280x1024+1920+0 (normal left inverted right x axis y axis) 338mm x 270mm
  1280x1024     60.02*+
  1152x864      75.00   
  1024x768      75.08    75.03    60.00   
  832x624       74.55   
  800x600       75.00    60.32   
  640x480       75.00    60.00   
  720x400       70.08   
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 160mm x 90mm
  1920x1080     60.00*+  50.00    59.94   
  1920x1080i    60.00    50.00    59.94   
  1600x1200     60.00   
  1680x1050     59.88   
  1280x1024     60.02   
  1440x900      59.90   
  1280x960      60.00   
  1280x800      59.91   
  1280x720      60.00    50.00    59.94   
  1024x768      60.00   
  800x600       60.32    56.25   
  720x576       50.00   
  720x480       60.00    59.94   
  640x480       60.00    59.94   
DP2 disconnected (normal left inverted right x axis y axis)