Yes, I can give you the technical reason this is true but that doesn't make it acceptable to me. When the Didache, for example, is references in the Ancient Literature section, the highest priority resource containing it is from the Hermeneia Commentary Series. Unfortunately the preview and the open resource functions show the commentary on the Didache rather than the text of the Didache itself. And, yes, this has always been the case in other sections as well but it is still a significant usability issue made more visible with the new functions.