When Madam Selena is about to unveil the Perry White statue, the far shot from behind shows Lois and Clark about to sit down. Clark is about to sit next to Perry White who is already seated (to Clarks right). White (which looks like a stand-in) is wearing a gray suit. However when the shot is seen from the front, White is wearing a black suit.
After Lois sneaks down into Madam Selena's private museum and is caught they put her in the second cell from the right. Then when Superman comes down to rescue everyone, Lois is now in the far right cell.
The invitation envelope addressed to Dr. John Hurley at Metropolis is postmarked New York, Station A Nov. 14 1944, even though the stories supposedly take place in 1950s.
The invitation to the Wax Museum Private Exhibition sent to Dr. Hurley does not state a date or time.
Even though Clark is in Lois's office, when the phone rings Clark says "I'll get it, it's probably for me", which he would have no way of knowing, and would be unlikely since it is Lois's office.
When Lois goes down into the private basement museum, she presses a button to re-position the table above to cover the entrance hatch, but she wouldn't know what the button was for since she couldn't see it's effect from where she was located.
The envelope containing Dr. Hurley's invitation shows a New York postmark, but the mail was presumably mailed within Metropolis.