In "Requiem" when Zoe is driving during the first close up of the speedometer, the speed can be seen increasing while the vehicle gear indicator suddenly changes to "P" and "R".
A student would never be pulled into a meeting in a school office with the parents of another student without his parents or representation of his/her choice and approval of his/her parents. This is a poor plot device by a writer who knows not enough about how schools actually function.
The emails that Evan creates to give the impression of a friendship with Connor all have the date on them, and it is highly unlikely that no-one would pick up on that date being after Connor's death.