Oh -- that means that "Locations" really is being used in two different ways.
But, if you're using the TOC macros, there's good news.
You can make "Locations on Planet A", "Locations on Planet B" , etc. and get the structure you need.
BUT, set the caption field of "Locations on Planet A" to "Locations". Same for "Locations on Planet B", etc.
Then you can get the output to look like: