Bug or intentional?

[Paul Louden]

Apparently within the WPS context menu some submenus (for example, sound 
settings) can be entered and exited without leaving to the WPS. 
Meanwhile others (like Playlist) cannot. Attempting to leave them by 
pressing "left" will take you to the WPS again rather than back to the 
root menu. JdGordon says this was intentional at some point.

Can anyone explain the rational behind why we should have menus that 
work normally going "right" but inexplicably don't when going "left" or 
is this something we can fix going forward rather than preserving it as 
a bad behaviour?