We have children and the website is saying we need to book two rooms.

The maximum number of people in a room is two. However we can accommodate infants with travel cots sharing their parent's room or an extra bed for children under 12 years old. Travel cots and extra beds are available free of charge from the hotel. As soon as you have made your reservation, please call the hotel directly in order to check the availability and book a cot or extra bed.