After the hostess seats Jen and Gail at the restaurant, Gail picks up her wine glass and sets it down, leaving her hand on the table but in the next shot, it's on her cheek.
When Jen and Gail are on the porch of Gail's house talking about a girls night in with food and music, Gail's hand is on her cheek as she's talking but suddenly drops to her lap in between shots.
When Jen goes with Gail to the restaurant and is asking Gail about if she and Mitch had a song, Jen's hands go from folded together and are in front of her face to only her left hand propping up her head as it rests on her left cheek.
When the gang is all in Dawson's room talking, Jack says something about, 'when we all started the school year.' The school year started at the beginning of season 1 and continued into season 2. Jack and Andie weren't there at the beginning of the school year, they started at Capeside mid-year, at the beginning of season 2.