The way it reads is that they never met the girl, they were matched and were about to meet her. Leo always sounds like he's wanted a sibling, as I'm sure Darren and Tim have mentioned this before. I'm sure before that they said when they adopted Leo they weren't sure if would ever speak, he's also deaf and had some emotional needs too, so he had some additional needs at the point of adoption. I do wonder if they were looking at another child with additional needs and due to the complexity of that child's needs they have realised that they may not cope with already having a child to look after. Leo is clearly thriving with his dads, so it's a shame it hasn't worked out, but it's much better to step away now than later down the process. I can see why they are so upset.