In screenshot 1 the unit of length is "nautical miles" which is indeed what is showing for distances and range rings, however the unit is for altitude meters and not feet.
In screenshot 2 the unit of length is "miles/feet". This allows me to get altitude in feet, however as you can see the distances and range rings are now in miles (1 mile = 1609 meters) and not in nautical miles (1 nautical mile = 1852 meters).
In screenshot 1 the unit of length is "nautical miles" which is indeed what is showing for distances and range rings, however the unit is for altitude meters and not feet.
In screenshot 2 the unit of length is "miles/feet". This allows me to get altitude in feet, however as you can see the distances and range rings are now in miles (1 mile = 1609 meters) and not in nautical miles (1 nautical mile = 1852 meters).