When weighing pizza balls today on the My Weigh KD 7000, I sensed an inconsistency in the weights shown so after putting the balls in the refrigerator, I took a container of dough and weighed it on both my older Salter scale and the My Weigh KD 7000. The Salter showed a weight of 716 grams on 4 of the 5 trials. On the other hand, the KD 7000 showed a variability from 698 to 723 grams. No two trials were the same. The weights were 723-698-713-708-717. I am concerned that I am getting unreliable and invalid readings. Since this scale came highly recommended, I wonder if anyone else has had this problem. Am I missing something?