@kaiserkiwi You're in good company, mate! This kind of thing happens to all of us at some point. While working on a search engine issue at my former job, I spent probably 2 hours on a bug like this, only to stumble upon the fact that I forgot to clear a secondary filter out of the gui tool that I was using to do test searches. :facepalm:
Glad you figured out your "filtering" issue! They can be really frustrating.