AFAIK nothing has changed here, it is just a question of very poor comms by AY but aren't we all used to seeing exactly that?
On AY/BA/AA (no recent experiences with the rest and heavy luggage) all Emeralds can take 1 extra bag on top of the ticket allowance and they can all weigh up to 32kg each. Then AY has this Gold/Plat thing on top with the sports equipment but that is another story.