I got my GA smartcard today and I was having a look at the various fares on the app regarding the AAA zones 7,8,9 issue.
I put in Amersham (zone 9) as starting station and Slade Green (zone 6) as destination and it offered me an off peak day Travelcard for £16.20
This ticket shows it’s also available for travel in zones 7,8 and 9
However, If I change the destination to Dartford (zone 8), it no longer offers a Travelcard at all (just offers a £26.20 off peak day return instead) despite the fact that the first ticket from Amersham to Z1-6 AAA7-9 at £16.20 should be valid but I suspect will not work the gates at Dartford…