I've watched every episode and studied each one over time, and none of this was ever noted.
Yes, but how do you think Cedric's family learned of the amulet and formed their own goals around it, if not around Grand Mum and Tilly? I'll clean this up, but I'm just noting a likely explanation for how Cedric and his parents learned about and were drawn into business around the amulet.
You can't do that. It has to be strictly official. This kind of stuff wrongly influences people. On Disney Wiki we write the truth, and that is from what the show says not what we say. If you want to write what you think or believe you do it either in the comment section or in a discussions.