The context of the following conversation is Carson was new at school and befriended Quinn, so Quinn introduced him to the cool kids.:
Carson says I'm confused, is Andy dating Brandy, or is Mandy dating Andy?.
The friend responds No, Mandy is dating Randy and Andy is single but used to date Brandy who is currently trying to start a relationship with Sandy, but she's too scared to commit..
Carson responds Wait, who's Sandy!?.
The friend responds Don't worry about her, she's one of the weird ones so you're probably better off staying away from her altogether..
Carson responds But Andy and Mandy are cool?.
The friend responds See, now you're getting it!.