This is totally on me, but I have some templates I created that I then realized had some errors, and then never actually minted any tokens. Even though there is no way to delete templates, most things will not show these since they have zero supply.
Is it possible to hide templates that have 0 issued supply from the filter matches for collection sets.
In attached picture, The first token on left has 0 supply, and the template that I actually minted is on the right.