Cantarell installs duplicate fonts

I'm getting GTK bug reports about the font chooser showing duplicate fonts.

$ fc-list Cantarell
/usr/share/fonts/cantarell/Cantarell-Light.otf: Cantarell,Cantarell Light:style=Light,Regular
/usr/share/fonts/cantarell/Cantarell-VF.otf: Cantarell:style=Bold
/usr/share/fonts/cantarell/Cantarell-Bold.otf: Cantarell:style=Bold
/usr/share/fonts/cantarell/Cantarell-ExtraBold.otf: Cantarell,Cantarell Extra Bold:style=Extra Bold,Regular
/usr/share/fonts/cantarell/Cantarell-VF.otf: Cantarell:style=Light
/usr/share/fonts/cantarell/Cantarell-VF.otf: Cantarell:style=Regular
/usr/share/fonts/cantarell/Cantarell-Thin.otf: Cantarell,Cantarell Thin:style=Thin,Regular
/usr/share/fonts/cantarell/Cantarell-VF.otf: Cantarell
/usr/share/fonts/cantarell/Cantarell-VF.otf: Cantarell:style=Extra Bold
/usr/share/fonts/cantarell/Cantarell-Regular.otf: Cantarell:style=Regular
/usr/share/fonts/cantarell/Cantarell-VF.otf: Cantarell:style=Thin

What is the intention here? Should distros install the VF font or the individual otfs?