As I’m in the US, I can’t tell you if it will filter by TV shows correctly using the MPAA for other countries.
But if you change the SMP to filter only by “TV Shows” and you are using your MPAA and only TV Shows display, then you are good to go. When I said MPAA, is what I meant is that this is how it knows whether it’s a TV show or a movie. Which MPAA’s, other than the US ratings, work I can’t say though.
As for your pic. Yes, the sort order is broken now. For TV shows it is supposed to use the <episode_number> to sort when you have it set to sort alphbetically. But the actors should show up without issue, as I can’t really tell (since I know little to no German), but it looks as though your meta xml is missing the actors info. You need to check xmls to make sure they contain something like this:
<actor>Gil Gerard, Erin Gray, Felix Silla, Mel Blanc, Tim O’Connor, William Conrad, Eric Server</actor>
If they don’t the the issue is with how you are generating the xml.
Changing the actors is not something that you have to clear the media library for. When you change the Overview, Actors or Genre it should display the new info pretty much instantly. The only xml data that you have to clear the media library for is if you change the Title and Episode Number.