I notice that the problem happens because LibreOffice shows splash window first.
And I can suggest you some tricks to avoid this.
Just add --nologo parameter into the application's run command (Exec=libreoffice --nologo ...) in each file named /usr/share/applications/libreoffice-*.desktop, and stop to keep launchers on Unity panel. Splash window won't be shown, but window control buttons, icon on Unity panel and in window switcher would appear.
I also think that duplicate status is wrong.
I notice that the problem happens because LibreOffice shows splash window first.
And I can suggest you some tricks to avoid this. applications/ libreoffice- *.desktop, and stop to keep launchers on Unity panel. Splash window won't be shown, but window control buttons, icon on Unity panel and in window switcher would appear.
Just add --nologo parameter into the application's run command (Exec=libreoffice --nologo ...) in each file named /usr/share/