I did say I thought the policy had changed, but the agents didn't think so.
That's surprising. I guess had your situation escalated, they might have called higher-ups and confirmed the policy.
I emailed TG customer service again, asking them why is this policy change not reflected on their website they replied the following -
Dear passenger,
We will inform and sent your comment and recommendation to concerned department to update policy information on the website and all social media channels.