Breville Barista Touch Impress always coarse setting, adjust the burs?

I just purchased this espresso machine. When I go through the Intelligent Brew Setup, it always ends up with very course setting, e.g. higher than 25. I used fresh beans, within 5-20 days. I have tried 3 different roast levels; light, medium, dark. The light roast pushed me all the way to 30, and seems like the extraction is still to slow. With the dark roast I ended up at 25 grind level, got a good extraction time and volume, and it taste good to me. It seems like I should have a wider range in the grinder. Do I need to adjust the burs, and if so which way?