If you turn your bike off by using the kill switch and then turn the ignition off you are taking two actions where one would do! The ignition switch will shut down all circuits in a way expected by the on board computers. The kill switch does not do the same thing, neither does the side stand switch. Both will leave certain circuits on. You have to turn that key at some point so why not just use it to stop the bike in the first place.
It looks like the switches are poor quality on these bikes, our local dealer is saying he has changed a lot of them. Hopefully the replacements are better quality. The concept of a rocker switch as kill/starter removes a whole world of fun, most of us will have cursed the bike not starting only to find we have flicked the kill switch by mistake.
Despite the best efforts of BMW assist to screw things up our guest has had a new switch fitted without drama, I hope the rest of his trip goes well.
John