Welcome to the tribe! And good job on the translation.The first rule should always be "to enjoy the hobby"
Enjoyment is key - we play the game because we enjoy it and, if your group can mutually agree how various rules are to be interpreted, then that's great. It's what the group I play with has done, and we're enjoying it.
However, that does not immediately exonerate Games Workshop. They have released a premium product with a poorly written ruleset, which has been crudely cut up and badly edited. Games Workshop has realised that they need to try and tidy this mess up or more people will give up. People already have.
They could easily have said - "these are the rules, live with it". Many of their cusomers would promptly stop bothering with it, and within a few weeks there'd be an N17 Community Edidtion with the majority of problems fixed for the rest to play... no more money for GW, no more support. So they've produced a FAQ and asked for questions, because it keeps people engaged. And by God we'll ask them, because we love the game and the hobby. We want it to be successful, because success = more players, more models, more opportunities to play.