So far there is a problem with automatic detection of the second tuner, but the manufacturer(Sundtek) promises to fix it in new drivers.
sorry it was updated for a long time already but I didn't have time to look it up. The Controlcenter needs an update for the dual tuners
[SERIALNUMBER/1] (slash 1) will address the second tuner in the configurationfile
[SERIALNUMBER/1]
dreambox_support_fe1=on
this will automatically register the second tuner.
So the update is needed in the controlcenter now.