High billing on days of no power

Recently, we were reviewing our Xcel bill. We now have the “smart” meter that bills us hour by hour and more between 5-9pm. Quite shockingly, on the 3 days in December when power was completely shut off to our house, we supposedly had one of our highest use days of power both on peak hours and off peak hours. I have reviewed several family members bills as well and am seeing the same thing — Billing for energy use on days power to homes was completely shut off. These meters are supposed to be so accurate that Xcel can tell if we use energy during peak times but they cant tell when we have no electricity use at all and just “estimate” a high usage? This seems like utility fraud to me….