I'm not sure what you mean by your first question?

Do you mean Heiji pretend he is leaving/tries to leave by following those that do and Joss "saves" him? Because yes if Heiji wants to put on his best zombie detective act in an escape plan that's fine-even if Joss didn't save him he couldn't get through the barrier.

Second is fine I will edit the setting when I'm on a computer rather than my phone!