It isn't a bug - (well it's classed as abug, but it isn't).
GNOME had a way of editing menu's graphically, but it sucked, and since then they are moving away from the old method of menu creation to a new method, but it isn't ready yet.
The best way to edit the menu's is to edit the .desktop files in /usr/share/applications. Look at some of the current ones to find out how they are working, and have a look at this link:
It's old, but basically still the same method.