Yes, I saw the word "faithful", and left it out intentionally.
That is why Judas Iscariot, not to be confused with the other Judas, is said to have been judged worthy of the "second death". However, the choice by lots of Matthias raises some questions. Did the apostles pray before casting lots? If so does that indicate that HS was involved? If God's HS was involved then why the need to choose Saul? Did HS make a mistake, like in the appointment of some eldurrs today? If there are only twelve foundation stones which of the thirteen faithful apostles is thrown to the curb? It seems to me that every time the WTB&T$ says one thing it raises three or four more questions.
As to the generation cross reference it is (Matthew 23: 36). . . "Truly I say to YOU, All these things will come upon this generation."
The cross reference is to (Exodus 20:5). . .You must not bow down to them nor be induced to serve them, because I Jehovah your God am a God exacting exclusive devotion, bringing punishment for the error of fathers (ONE generation) upon sons (SECOND generation), upon the third generation and upon the fourth generation, in the case of those who hate me. . .
That indicated in their NWT that a generation was exactly that ONE generation. In their RNWT that cross reference has been deleted. Can't have intelligent, thinking people finding that, now can they? Soon it will be forgotten and the new two overlapping, soon to be three generation explanation will be all that will be known.