The KLAX extension is not obviously a "bug" of the scenery, since as explained so many times, when you buy a scenery, you don't buy a maintenance program to keep it current with real-world changes so, we might eventually decide or not to update it, but that's not something you must expect.
The KLAS markings are, instead, something that we'll fix and we already confirmed we will in other threads, but we don't have a release date right now.