It used to be that when both Old Testament only resources and New Testament only resources were added to the Text Comparison then only the appropriate resources would show when viewing either the Old Testament or New Testament respectively. Now, whichever resource is listed first will show all the resources, but if the Testament is changes it does not show.
For example:
When listing a number of Hebrew Old Testament texts and a number of Greek New Testament texts, the Old Testament passages will show as long as an Old Testament text is listed first. However, when switching to the New Testament, none of the resources are able to show.
A workaround is to have the first resource as a text that includes the entire Bible, however it would be nice to have it automatically show the respective resources when changing between the Testaments.