just make sure, if you get above category_0 and category_1 to category_2, 3, etc... that you ALSO put a copy into the common folder (not just your layout folder) or you cannot even choose those files. THAT IS NOT DOCUMENTED ANYWHERE... though it often says to put a copy of those files in the layout folder, nothing mentions adding files to common.
in fact, it says that common gets overwritten in updates!
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