Stefan; no, I didn't misunderstand you.
I just pointed out that I don't think it is so weird that Elias does backing vocals on some of Maria's songs while they are on stage - that is just what he does. I've heard her introduce "All This Time" as a tribute to him as well (which was what I tried to explain in my reply above). by saying I've heard her introduce this song as if it was about him, I don't mean that I heard her introduce her song before the performance on Kuschelrock, but on a concert.
and yes, I know that the 2nd vocal is by that woman standing behind them all on the stage. I don't much like it, though, but I guess that is because I've always heard Maria sing the entire song herself.
I've noticed that in Germany Maria seems to sing "All This Time" exactly the same way it's sung on the record, and that in Holland, she makes all her live performances very different from how they are on the record. that is just my opinion, though. I think I prefer to listen to those artists who can make their songs into something else in their performances, and not always having to sing the songs exactly the way they have been recorded.