I'm catching up with the overnight threads, so pardon me if this has been answered already.
Lyric lived with in Evansdale with the Collins family while Misty was in prison, IIRC. After Misty got out, she and Lyric began living with Wylma in Waterloo.
As to Dillin, Lyric's only sibling, I'm not sure what his situation was. I thought I'd read that Wylma had temporary custody of Dillin and Lyric, but that might be conjecture and not fact. I'm not sure where Dillin lives, but I think he and Dan were living with Dan's mother in Waterloo when the girls disappeared.
IMO, while this was Lizzie's neighborhood, Lyric had lived there and visited there often enough to be familiar with it.