Add a heading for satellite legend.
The first time I displayed the legends, the layers I had selected were radar and satellite. There is a heading at the top that says "Radar" and no heading for "Satellite". However, the fourth line was really for satellite, even though it seems to be under the "Radar" heading. At first I thought the legend for satellite was actually missing. I finally figured out what was going on when I displayed the legend when only the satellite layer was enabled. The confusion I encountered can be avoided if the satellite legend is properly identified as such and in a manner consistent with the way the radar legend is identified.
Yup, that's a bug -- good catch.