Danny sits on a stoop with his arms on his knees, but when a different camera takes over at 28:50, his right elbow is on his knee while his head rests against his palm.
At 43:55 the gang heads upstairs to find Danny. At 43:58, an exterior camera takes over. The 6-man gang turns into a 5-man gang with Stash suddenly missing from the group. He doesn't appear again until 55:19 back in the basement clubhouse after the hospital scenes.
Searching for Danny (being beaten by a gangster) in an abandoned poultry warehouse, the gang looses track of Glimpy, finding him twenty-eight seconds later hanging unconscious from a wall hook with Danny, beaten and unconscious, lying on the floor. In that short amount of time, across a hallway with (at some point) doors open, neither the gangsters nor the noisy East Side Gang hear each other or come in contact.
When Glimpy drinks the sedative being delivered by a nurse, he leaves less than half of it. The nurse continues on her way instead of heading back to refill for a full dosage to her patient.