Steps to reproduce:
Now fill out the tracker data. You will see that where the category is listed in the edit page, there is an "Array" where it should say the category name.
Now select the item and save.
You will see that the category correctly shows outside of the edit interface.
I can create a show instance if this is not clear enough. I'm attaching some screenshots as well. They should be relatively self-explanatory as well.
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Unable to connect to show.tikiwiki.org. Please let us know of the problem so that we can do something about it. Thanks.