(23 Aug 2013, 1:15 am)CatsFast101 wrote Another example I've come across is the lime 8/78, similarly to what Daniel said.. Lets take for instance your going to Chester-Sunderland then back, you could buy a Green & Red Zone Buzzfare on the 78, then knowing you can also use the 8 between them locations you attempt to board an 8 but are refused due to the fact the 8 enters into the purple zone. It's the same journey!
It was the same years ago with Network Traveltickets. Gateshead to Metrocentre was 2 zones (25 and 26) if you caught the X66, but if you travelled on a bus that went via Lobley Hill for some reason you needed zone 35 on as well - so it is not something new (I worked in Travelshops in 1993). The amounts of arguments that we had with the customers was unbelievable as they had been charged to travel through zone 35.