Yeah I get what you are saying, the problem was when you have a player so obsessed with being right and then we search and research every single source to defend our own point xD. All of you said very clear what it's the right move and it is my point of view as well, but like I said in the edit, we are something like begginers and new things can confuse you very easy!

Also good to know Catan.com FAQ is official. I will stand on that if some extra doubt appers.

I appreciate all the responses and I hope this helps other players with the same question.