Set 11 UD

[Khiruki]

Beast King Rivera seems to be UD, while Beast Emperor Rivera is not. Is that a mistake?

[hexagram]

probably not? Some data from set 11 immediate usage?

logress can give the definate answer.

[Logress]

Hmm. Not sure, maybe some cards have more data than others. I could run it again, but at this point it'll probably boot half the set off the list.

[Icyglare]

Yea, I gotta admit the UD list looks really wierd but it's fine, I don't care if the UD list was completely random.

[Shirozaki]

I think the actual problem is the fact that names that can be associated with two cards don't appear on the list this time. Rivera, Miffyre, Verlaat, Annarose (curiously the two EX annarose do appear) etc.
All their set 11 counterparts are on the list, whereas old set versions are not. (And in Rivera's case it's the opposite)