I have my Exegetical Guide, 'Commentaries' section set to "All Commentaries" and yet when I search for a given text it does not seem to always return complete results. For example when I type Acts 15:16 into the reference box it does not give me any results from the IVP series, which I have prioritized immediately after the BKC commentary.

Yet if I enter Acts 15:1 in the reference box it returns IVP

And if I do a Basic Search with type:commentary it does find references to Acts 15:16

What's up with that??