While Tory and Sam are having a drinking competition at the party, Tory takes a shot of vodka, then waits for Sam to drink hers. Sam finishes her shot and when the camera pans back to Tory, her shot glass is full again.
As Sam and Tory are standing on the stools during their drinking contest at the house party, Sam tosses her shot glass down after drinking it. Tory then falls, and Sam is seen holding the glass in her hand again.
During the drinking match between Samantha and Tory, there are close ups of both girls standing on stools. The close up for Tory reveals she is wearing red sneakers without socks. But as the camera pans out to a full body shot moments later, black ankle socks are visible above the tops of her shoes.
After Tory tells Big Red to pour two shots of vodka for Sam and herself during the drinking game, Tory takes her shot, then it's Sam's turn. Sam takes a sip and starts to stumble slightly, then the camera switches back to Tory and her shot glass is full again.
The party at Moon's house takes place at the end of summer, before their first day of classes. The timeline of this is early September. The typical climate is warm/hot and sunny in the Southern California area year long, especially late summer. During the party you can see the leaves on trees are red/orange/yellow and partygoers are wearing jackets, sweaters and long sleeve shirts. The show is filmed in the Atlanta area where this climate is more common.