M/s , kts and mph

I am currently running Mission Planner 4.1. I went into Config/Planner changed distance units to meters, altitude units to feet and my speed units to knots. I have since noticed in the Actions tab the change speed seems to only work in m/s and can be a bit confusing.
Also making a flight plan my WP Radius shows up in feet but acts like meters. Is there a way to change this? I am new and very grateful for any help thanks.