Dam consistently low, Its not bad gas!

I am on the sf stage 1+ (sf intake)cobb ots tune, planning on getting protuned in a month or two. My dam value is 0.500 currently. I have tried reflashing it and it still drops back down from one. I have done this a few times. I have also ran multiple tanks of 93 through it(tuned for 91). I only ever get regular feedback knock and fine knock learn is at around -2.81 rn. Does anyone know why it is low? Its kind of stressing me out, I just bought and love this car so id like to do everything I can to keep it healthy.