Yes, you do have to adjust. Your UST time stays the same. You instead set your clock time. When you adjust your clock time and go to save, it asks if you are adjusting for DST. It tells you what button to hit if you are, then saves the time. When I went back to the main screen, my door times shifted by an hour which is what I wanted.
So, it knows about the concept of DST, but doesn’t automatically change your clock on the changeover day, you’ll need to do that manually. I can live with that 2x a year.