Because they aren't in the database yet. They also aren't released on client as far as I know.
And by not in database it's because they aren't recognized as 'greater' quints.
And by not in database it's because they aren't recognized as 'greater' quints.
Well client says I can purchase all of them.

The most in depth guide to Twitch around.
Props to wRAthoFVuLK for the beastly sig and putting up with my request XD
Hey, you should help me on acquiring Medieval Twitch!! :D
http://signup.leagueoflegends.com/?ref=507f1031d2ab3250817727
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Hey, you should help me on acquiring Medieval Twitch!! :D
http://signup.leagueoflegends.com/?ref=507f1031d2ab3250817727