Yes, all of the St Ives services are St Erth to St Erth and have one headcode, this is because of the stopping pattern in the daytime, from St Erth every xx41 service calls at Carbis Bay, and the xx11 services don't, however, you are allowed to go via St Ives to Carbis Bay as the xx11 services stop on the way back. i.e. xx11 services go St Erth - Lelant Saltings, St Ives, Carbis Bay, Lelant Saltings, St Erth and the xx41 services go Lelant Saltings, Carbis Bay, St Ives, Lelant Saltings, St Erth. It's put in the system like this so people can buy tickets to St Ives and use the xx11 connections. Hope i've explained this in a readable way?