In the scene where Lana meets Lex and climbs onto his car, Lana is wearing wedges - in the scenes before and after she is clearly wearing stilettos.
Up until Lana is about to electrocute Lex, she is wearing a black, leather jacket. When Lex suddenly kisses her, the jacket is gone with no shot of her ever removing it.
Clark and Lana's love-making sends ripples out far enough to shake the buildings in Metropolis which is three hours away, which means that the Kent farm should have been destroyed, to say nothing of any other buildings in Smallville since it was the central location of the disturbance.
Lex places the Zion materials into a safe in a discreet location in the corner of a hallway. Lana immediately shows up and removes the door of the safe. From the camera angle shot from inside of the safe, Lana is no longer in the hall, but in a large room with the fire burning behind her in the fireplace.