EDIT: In fact, I admit that when I set up the tunnel, I somehow "visually filtered" the routeable /64 on that page as being a repeat of the 6in4 tunnel address, and presumed that we weren't assigned a routable network until we requested a /48. I just didn't look close enough at the headings, or examine the addresses close enough to see that they were actually different IPs.
EDIT2: Looking at the page, I see that they actually are in their own sections. Not sure if they were back when I set up my tunnel.
They had lines between each "section" in the past, but no section headers. I'm hoping the labeling will help distinguish that there's something more than a mass of potentially redundant values listed in various spots.
Ah I see. You may even want to make separate sections for the routed networks and rDNS. Maybe that'd also help.
I think the main reason people sometimes don't spot this is because we tend to look more at the ends of the addresses, and not at the 3rd quad, where the difference exists, to differentiate them. My tunnel address ends in "dc7::2/64", and my routed address ends in "dc7::/64". So I think I was focusing on the addresses, and presuming that the "dc7::2/64" was the host address, and the "dc7::/64" was simply a listing of the tunnel network address. Had I examined it more closely, I would have caught that the last byte of the 3rd quad was different. Or, if I had looked left a bit and payed closer attention to the headings, I would have caught it too. But for whatever reason, maybe 'cause I was in a rush, or because my mind was more focused on setting up the tunnel, I just "missed" the routed /64.
Anyway, there's a whole field of study and engineering dedicated to designing things like this called
Human Factors Engineering. A friend of mine does this for a living. He tests, evaluates flight control systems for aircraft. They often completely redesign displays, controls, panels, etc, which seem completely logical and adequate to the task, but turn out not to work well in practice because of human psychology and senses. (e.g., "Human Factors")
