I've invested a fair amount of time into typing up search fields for the A-F syntax search and have noticed that I'm not getting correct returns on my searches. They work fine in the other searches (Bible, Morphology etc.), just not in the syntax search.
Here's the image:
I've created a category called "confessional formulas" and to test it I searched for a segment with יהוה in it. I should get 10 hits. Instead I get 3.
For example, if you look on the bottom right in the "search range" box, you'll see that I've typed in Ps 71:1. This verse contains the segment יהוה. The closest I get in my results (top left) is Ps 140:7 (and 6 other results are missing). I did the search again. limiting the search to the Psalms and not to my formula and got the verse (bottom left). As I mentioned above, I also searched in morphology and Bible using my personal search field and got the verses (i.e. the fault doesn't lie with the way I've constructed my search field).
I should add to this that syntax searches also don't work in passage lists, but Dave Hooten has already alerted about the bug.