I have three collections that NET Bible is in:
Best Bibles: English
Bibles
Bibles: English
When I first opened the the "Parallel resource sets", It opened to page 2 of 2 with "All parallel resources" selected (checkmark in header). I went to page 1 of 2 to see what was there, and suddenly "Best Bibles: English" was selected instead. I went back to page 2 and now "Bibles: English" is selected.
I think that "All parallel resources" should have stayed selected unless I explicitly clicked on a header (which works now! yeah!) or a resource. Unlike quantum physics, observation shouldn't change the state of the system. :-)