I can confirm this on both my Ubuntu 13.10 install and a live CD of 14.04. It's very annoying to see two menu bars. Inconsistent to the UI. I suggest hiding one of them for now at least, and if anyone has time make it so the GTK2 style menu bar is in the top panel in the global menu. Please remove the Gnome 3 menu.
I can confirm this on both my Ubuntu 13.10 install and a live CD of 14.04. It's very annoying to see two menu bars. Inconsistent to the UI. I suggest hiding one of them for now at least, and if anyone has time make it so the GTK2 style menu bar is in the top panel in the global menu. Please remove the Gnome 3 menu.