When Mannix is chasing Steve through the stadium tunnels, they pass through the same tunnel three times.
When Mannix is talking with Marcie and Karmalis inside the mansion, the mantle clock shows that it's 12:00 noon. But when he leaves and is walking down the driveway, the shadows from the vegetation are long, as if it were late in the afternoon.
Karmalis shot Boyle inside the abandoned warehouse as Mannix was just outside the warehouse door, yet Mannix did not hear the gunshot.