xfce4-xkb-plugin doesn't work with combination of few layouts and internet keyboards(Logitech, MS and so on). It will display one of the layouts as "INET". Here I attach patch which fix it.
Created attachment 82331 [details, diff] patch for correct layout name lookup this patch force skip defenition of extended keymap for "internet" keyboards, when xfce4-xkb lookup for layouts. Example: #setxkbmap -print ... xkb_symbols { include "pc/pc(pc105)+pc/us+inet(logiinkse)+pc/ru(winkeys):2+group(ctrl_shift_toggle)" }; ... without patch plugin will assume "US" and "INET" as layouts names. with patch it will find names correctly.
I've sent patch to xfce4-xkb developers,they released today new version 0.3.4 which includes patch.
same is with latest x.org .... with it xfce4-xkb thiks 'ps' is another layout i've sent a patch upstream and it was accepted... so ... i't would be nice just to bump to latest (for xfce 4.2) version 0.3.5
New veriosn 0.3.5 in the tree, thanks for the note.