When the gang is in the Magic Box and they pass out, we see Buffy fall on the floor at the top of the stairs, but in the next shot she has moved and is now lying on the steps.
When the vampires storm into the Magic Box and everyone is clinging to each other, in some shots Giles is holding Anya with her back against his front, and in other shots she has her arms wrapped around him with her front against his.
When the Scoobies are kneeling on the floor after they get scared by the vampires at the door, Buffy is holding a stake with the point pointing up and towards the window. Then the camera goes to Tara and back to Buffy. When it's back on Buffy she is holding the stake with the point pointing down to the floor.
When a "hench vamp" shoves Spike up against a bookcase in the Magic Box, both vampires are reflected in the glass of the case's doors, and later the vampires lurking outside are reflected in the shop's front window.
Everyone seems to figure out who they are by looking at their driver's licenses or school ID cards, but no one has looked at their reflections to see if they match the pictures on the IDs.
Willow is trying to hide that she was doing magic, but left the entire bag of lethe's bramble out in the open in the living room.