0dB to -50dB will always change in 0.5dB increments. The option only changes the increment below -50dB. Who knows why it works like that, but 0.5dB is a bit slow for me as well.I have a little annoying issue with it, otherwise it's been a charm to use a combo on desktop. I can't swap the level change incrementation. I get into the startup menu and go from 0.5db to 1.db incrementations, then saves the settings but it never actually works and still go 0.5 by 0.5, which i find super slow.
Is that a bug someone else encountered too? Im on the last firmware i believe.