ML 2.04 and 2.07 on U 14.04 lts creates duplicate category when adding new launcher to existing category

[rich painter]

Running Ubuntu 14.04 lts 64 bit.
I am running Gnome3 instead of Unity.
At first I installed the ML 2.04 from the standard repos.
I ran ML and added a launcher for Putty to the Internet category.
I saved the launcher.

Now when I drop down the Menu Applications it has an Internet as the 5th category AS WELL AS another one at 13. The new launcher appears in BOTH Copies of the Internet category.

I added several more new launchers (ostensibly for Accessories). The same happened.... I now have Accessories in the 2nd position and ALSO another one in the 13th and the extra Internet is now in the 14th position. The added launches appear in both category copies.

The only launchers in these duplicate categories are the ones added by ML.

In ML neither of these duplicate categories appear.

If I delete the Putty launcher the EXTRA Internet category disappears and the Putty launcher also is removed from the first (original) Internet launcher.

Next I installed the MenuLibre ppa and then the 2.07 version.

I got the same results.

How do I get rid of these duplicate categories?

[Dawid M. (dawid.mlyn)]

The same behavior is still present on Xubuntu 19.10 with MenuLibre 2.2.1.

Whenever I right click on Xubuntu Logo --> Edit Applications and modify some app .desktop file, for example chromium_chromium.desktop, it shows me the "Internet category" twice - the first is listing all the Internet apps from /usr/share/applications, while the second "Internet category" is showing only the modified .desktop file located in ~/.local/share/applications/chromium_chromium.desktop).