After being stopped, Chris pulls the bag off Jaden's head. His face is covered with sweat. In the next shot, he's dry.
Persona contacts Hayley Blackwood and tells her the old password to her deceased daughter's account. For security reasons, large-scale tech companies typically store passwords in a way that they can't be recovered unless a very large amount of computing power is invested. It is much more likely that they'd use a password reset procedure to grant her access, or lacking that, assign a new password to the account and tell that to Hayley.
(around 29:21) Smithereens analyst finds Chris' account using the mobile number that he used to reach the company. The screen reveals that he has registered on 04/19/2012. But when Billy Bauer is searching for his profile, he said that Chris is a user since 2008.
The password that Hayley is shown entering at the end of the episode is longer than the one she received.
The sniper could change his position for a clear shot long before Chris ever got to talk to Billy, but he didn't.
Hayley forgets to scratch her third failed password attempt from her notebook.