Just after the cut from the Visitors getting their visas, Elizabeth Mitchell's character is sorting through information about people from the list acquired previously. She types the name 'Brian Downs' in a search on her computer, but when an immediate cut is made to a close-up of the computer screen the name now reads '-obert -ands'. Although the complete name is missing, it is clearly not 'Brian Downs'.
When Erica is typing in the name of a person to search for in the federal database, she types in "Brian Downs" but when the "No Results" screen comes up, the name is "Robert Ands".
When Erica Evans sneaks into the room across from the Visitor's "Perimeter Surveillance" room, not only does the sign reading "Those of the body only" in alien text disappear from the door when seen from the inside, but also the opposing hallway wall shows a different hallway with a turn where there was a narrowing instead.
When Dale exits the virtual construct Joshua made to help him remember (34:50), in the closeup shot of his eyes opening, he is clearly wearing a grey shirt. In the next shot, where a needle pierces his arm, he is bare-chested.