Removing children we only do when we know where they do belong, but I'll take a look for you and try if I can find more about them, if we disconnect them from parents they will be floating around and maybe get reattached or no one looks after them anymore... some families sometimes have a whole lot of children or duplicate children (some children came in due to maybe not such great merges) and yes sometimes children that don't even belong to that family.
Love your magic ! :)