Yes, the checkmark is there - good that you were able to reproduce it.
I can also reproduce your point, I'm getting 9 outputs from helper->resources->noutput - that makes perfect sense, since xrandr reports 9 outputs for me, but only 3 of them have connected screens.
xfce4-display-settings reports only 3 outputs, which is just the ones actually having screens connected.
Yes, the checkmark is there - good that you were able to reproduce it.
I can also reproduce your point, I'm getting 9 outputs from helper- >resources- >noutput - that makes perfect sense, since xrandr reports 9 outputs for me, but only 3 of them have connected screens.
xfce4-display- settings reports only 3 outputs, which is just the ones actually having screens connected.