Rode at Buxton today myself and took a short walk up the start of Cathedral Climb. Very nice work, but it was obvious that many had been riding it despite the signs. In my experience, without immediate consequences or someone looking over their shoulder, people often do the wrong thing when it suits them.
On my second lap, I decided to go down Skinny (Track 8) and found something odd. Where Skinny crosses over Cathedral Climb, a "Track Closed" sign had been planted across the continuation of Skinny where it runs down the hill. Seemed strange as the trail only goes another 20-25 m further before it rejoins the main Acheron Ridge loop and the sign would be more logically placed at the left turn of the Cathedral Climb junction, to (hopefully) prevent riders from using the new, unconsolidated trail. Somebody playing funny buggers maybe... ?