Continuity mistake: In the scene where Dakota is having sex with Aubrey's boyfriend, it specifically shows that her bra is off. Once they finish, and she is getting off of him, she is covering her chest with the sheet. When she does this, her side isn't covered and you can that she is now wearing a black bra.
Audio problem: When Dakota and Jerrod start having sex, Aubrey's mother can hear Jerrod's moans through the ceiling. But up until they *really* start getting into the act, the moans that Susan is hearing don't match the shots in the bedroom.
Continuity mistake: When Dakota is at the strip club, she has on high heels. They then change to black boots.
Character mistake: The coroner examining Jennifer Toland's body reports that her fingers were cut off first, then the metacarpals (palm bones) were removed later. Given that when she is found her entire limb is missing up to her mid-forearm, how could he possibly tell not only that the missing part was not all removed at once, but which bits were cut off in which order?
Continuity mistake: When the guy at the start takes off his T-shirt there is no tattoo. Then the tattoo appears. (00:11:40)
Answer: Blue's the color for Aubrey's character, and the red one's for Dakota. If you watch the movie carefully you can notice that Aubrey wears blue clothes the most of the time while Dakota wears red ones. So it's just to represent the diferent characters and make the movie obvious.