This means that if you press another button to change profile, the second one lights up, the first one doesn't go off, but luckily, you can turn off the first one, also while being in another profile, since as wrote above, the second press of the same button doesn't send any signal, it just turns off the light.
This is the way I use it. Very handy, as I use 8 different profiles.
This behavior is programmed using the x-touch mini editor. I'm not at my pc right now, so I unfortunately don't recall how the function is called.
If you need help, lemme know.