Polar Plot size

Hi everybody, the scale of my polar plot changes whenever I try to plot more than one polar plots within the same experiment, especially if the data have different magnitude, like the previous plot would shrink if I try to plot a second one with bigger radius data. I ended up creating a new experiment for each of the polar graph that I want to make which is becoming more and more cumbersome. Does anyone know a solution here? Thanks!
Please post (or send to support) an experiment which demonstrates the problem.

--Jim Prouty
Software Engineer, WaveMetrics, Inc.