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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Not a kata issue, and it's been discussed before (several times). The test is ok. Look at Daotar's comment a few posts down.
And who said that it's author who is wrong, and not you?