I guess they can change it anytime they want.
I was the one who proposed a new (seperate) registry set for the 2009 cents and the new sheild cents. I was the first one to get my 2009 perfect PF70RD Ultra Cameo cents entered into this new set with photos & descriptions and I was under the impression that I would remain at the top of this pile until I change something. Last week, even tho I haven't changed a thing, I fell into the second slot (still tied for #1), and now I've fallen into the seventh slot. I'm not sure how this happened, because I still haven't changed a thing. My set shows a revised date of 9/16, but that was done by the registry, not me.