In article ,
Mizter T wrote:

The first gateline would have already 'ended your journey' - however
going through the second gateline should not have been a problem at
all. Stratford is unique in having this double-gateline arrangement

I guess that's why I never encountered it before. Wonder how often
they get bemused passengers standing there in puzzlement?

You certainly shouldn't get charged for an unresolved journey at all.

Incidentally you bought a zones 1-6 Day Travelcard just for a rail
journey to Enfield Lock (and back?) - no need! You could have just
bought a single or return rail ticket, or indeed a zones 2-6 Day
Travelcard (at £4.80) as appropriate.

No, I bought a CDR - that was 6 quid (or 10 with a network railcard)!