When Lex is in the closet as a child, he looks through the air grate in the wall and you can see the legs of a table. Then the camera cuts back to Lex, when the camera cuts back to the grate again the table legs are gone.
Ms. Swan tells The Traveler that she will "take an apartment in Metropolis" and she tells Lex that she has been living in Europe. The headline of her death says "Prominent Metropolis Citizen...", implying that she was a full-time resident.