hmm I have to cite myself on this because I'm further confused by that stick on the right wing: Looking a bit closer, I've found that the labeling on the stick is apparently historically correct. It states "ZU", meaning "closed", when fully extended (the stick), despite the rads seemingly working just the opposite way.
So it seems that they've done their historical homework by looking into the emil manual, but there's just another case of sloppy programming. Or maybe it's a translation error. An error nonetheless.