As a tourist who loves exploring the system, I arrived at Wimbledon station by train and intended to change to Tramlink 2-3 years ago. I had a valid Oyster card which was validated upon entry at London Waterloo. When I got to the Tramlink platform, I got quite confused, as I expected validating on the platform to end with an end-of-journey validation, even with the signage. I went up to the gateline, explained the situation to the staff member there, and then basically got berated for not understanding how it worked. He then took my Oyster card, placed it on gateline reader to end my Waterloo-Wimbledon Journey, and then told me to go down to the Tramlink platform, and validate again there.
This all seemed very weird, confusing, and quite angering, as I don't really think anything is wrong with my language understanding, but the signage wasn't 100% clear to me. And after reading this thread, I also believe the gateline assistant wasn't correct that I needed to touch the Wimbledon gateline as well, before going down to the Tramlink platform.
To see the situation still isn't 100% clear and people get charged a full penalty fare is quite disappointing. Extra announcements on the Tramlink platforms / the tram whilst waiting at Wimbledon would surely help, as well as a rethink about poster design. When it's busy, I don't have the time to stand at the top of the stairs to read a poster, nor hover in front of a validator to read all instructions while there are people behind me.