As the group is reeling from Barry's disappearance, Wells calls on the intercom for Jessie to "come down here", then panics when she doesn't answer, leading a rush upstairs where they find Jessie and Wally unconscious. But none of them knew that Jessie and Wallie had escaped the Time Vault. As far as anyone knew, they were still locked away and couldn't have come down.
When Tony attacks the car outside the Big Belly Burger, a sign can be seen behind him for a check cashing business which uses the Canadian spelling "cheque" instead of the American spelling.