Yeah seems weird to me as well. I'm confident in my scale, and weighing abilities so it must be something with my fill method. I'm not new to the omicron, i've been using it for 6 months and really feel like i have it down. I've tried a bunch of the fill methods - blow dryer, lighter, torch (never letting it get too hot) and i never see any smoke coming from the cart which i know is a good sign. What is your method OF? Do you do anything special?