Hints were always there in the manga for the twin theory, it's looking for them though
Check this out:
http://theofficialdoublecieltheorist.blogspot.com/?m=1
If you think clues being laid so subtly and adroitly to lead people to a specific conclusion is disappointing then I'd HATE to see what you think would NOT be disappointing. Because it probably would disappoint me. BTW, if you HAVE read the manga you would KNOW that Yana Toboso has also pulled a fast one on us at the eleventh hour, before, so the twin theory could totally be blown out of the water at some point later on, too. Mmkay? KTBN.
Kauppa ja TurvallisuusMinisteriö???
Im so dissapointed in that there was "twin" i thought it would be more interesting :/
But something isnt quite there since non of the earlier stories dont tell anything about another child?