No problem GreekFire!
Official and canon are two separately things. They're using the term official correctly, and these are indeed official and can be used at official events as long as they meet any other requirements of the event. These are completely official and created by, or in conjunction with, Catalyst Game Labs.
Whether or not they're canon is another issue. "Sort of" would be the best answer at the moment, because it actually requires some context to answer fully.