AeroPod, PowerPod and Newton

i have had this thing for a week and i'm ready to toss it, i have done at least 20 coast's, i think once it seemed correct, i have done everything over and over, and just when i think the watts are good the next day its off. as far as the data for the coast calibration whats the most important?

i had the same thing happen today, watts were 1600 on a descent, i also noticed that the current % elevation was 7% , so something with the tilt and the position must be a big factor