When Collins is impersonating Jimmy and holds Mr. White and Lois at gunpoint, it's night time. When Superman is en route to the Daily Planet, it's daylight outside. Then back at the daily planet, it's night time again.
When Clark Kent calls in the forest fire news to the fake Jimmy Olsen, he tells him that the fire is out but the forest is lost for ever. Actually, forest fires create what is called, "ecological succession" and forests often grow back even more lush than before.
When Superman is in Perry White's office and talking with a recovering Jimmy Olsen, Superman then needs to leave and runs to an open office window that is the exact same open window with near by chair that is in the store room, which is Superman's normal exit from the Daily Planet.