The National Trust guide on duty in this room told us that this being a Georgian House, the cutlery is laid to reflect the fashion of the era: guests would be wearing sleeves with ruffles which would have caught on the knives, forks etc if they had been laid in the usual way.
A small and belated September update for 2024, where I am still, after many years' membership, on 365 Project, also now posting elsewhere but wanting...
You have a practical and enquiring mind I think!!