1. There is no compensation. You were not delayed. Had you been delayed at LAX by 3+ hours you would have been due EUR 300 and by 4+ hours EUR 600. In your case, nothing. Seems quite correct too.
2. This is all a function of too much information leading to expectations. None of it mattered and thus, not worth imparting. If you wish to send in a brief 2-3 sentence (maximum) note saying that you did not appreciate the incorrect information, you may certainly do so. You will receive a standard cut & paste response to the effect that AC is sorry it didn't; live up to your expectations and hopes to see you again soon.