I have learnt something as I thought if a station was named the teain had to stop there. If travelling outside my 60+ Pass validity I normally buy a Boundary Zone 6 ticket.
There are exceptions e.g. if travelling Beyond Dartford, Swanley or Amersham etc., I buy a ticket from these stations as the 60+ Pass is valid to these stations which are in Zones higher than 6.
Sorry if I am repeating points already raised.