Did the system really allocate the children 30 rows away from their mother? I have known if it splitting up families, but never by that amount of rows. The check in agent probably had no seats available at that moment to sit the family together, due to a high level of pre-booked seats already allocated. Where did they end up sitting once on-board the aircraft? As cabin crew, we would not be happy about children of that age being sat 2 rows away from their parents, never mind 30 rows. We would of reseated other passengers before departure to ensure that the children were safely looked after by their mother.