When Jimmy accidentally closes the door on the safe, he could have just reopened the safe by pulling the handle. The handle had not been turned when he closed it and it did not set the pins.
When Jimmy puts the last stack of money in the shoot to burn, Lois returns a stack of money back into her purse. This would indicate he had a lot of cash leftover. There should not have been a need for Jimmy to ask Clark for fifteen cents for bus fare at the end of the show.
The Acme Department Store deliver man is dressed in a hotel Bell Hop's uniform.
When Lois calls Clark she never tells him where she and Jimmy are. Yet, Superman is able to arrive at the correct location.
At about 5 minutes, Superman pulls the door off the safe to rescue the cat. Actually, he would have used his X-ray vision to see and set the tumblers and just open the safe. That way the safe could still be used to protect its contents.