In the first battle, the DJ plays the instrumental of "The Next Level (remix)" by Show + AG, which was released on PayDay records. The records shown on the decks aren't PayDay records. The DJ is using the same records in the end battle, when a different track is played.
When Jimmy gets his sweater from behind the bin before the first battle, Cheddar Bob asks "are you going to stay at your Mom's?", then puts his cigar to his mouth. When the angle changes so you can see all of the 313, Bob is clearly holding his cigar down when it should be in his mouth.