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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.
When I authored the kata there was no problem, something has been changed in the CW version hence the tabs bug.
I re-edited the kata and it should work now.
Thanks for your post!