There are some inconsistencies in the listing of parallel resources, when you click on the + tab to open a new tab.
If I have the Holman New Testament Commentary on Revelation open in the introduction and click on the + tab, it lists 5 commentaries. But if I do this with the New International Greek Testament Commentary on Revelation, it lists 4 parallel resources.
Interestingly, the resources listed seems to depend on where I am in the commentary. If I am in the Introduction to the New International Greek Testament Commentary, it lists only 4, but if I am in Revelation 22, it lists 34. If I am on a particular verse, the number of parallel resources can vary wildly.
I understand that this might happen, because headings are not the same. But I wonder if there ought to be a fallback position for commentaries, if there is no exact topic match. For example, if the chapter and verse is not a hearding, perhaps it should fall back to the chapter or the nearest matching Scripture reference.
Oddly, if I choose the commentary, it does not always go to the right place. For example, after asking for parallels to revelation 22, I clicked on the NIV New Testament Commentary icon in the list and it opened to the title page of 1 Thessalonians. I could give other examples, but you get the idea.
