There is no "less than a second". The screen change is instant. But I have solved the problem by using the menu option where I can see the "less than a second" take place. Comparing the two methods, I don't think the Mode+Trash option is doing anything at all.
It definitely works. You aren't doing it correctly.
Impossible.
Note that for the second card slot, you need to turn the back control wheel to switch the formatting from the primary to secondary slots.
Using only one card at a time of each.
Until you figure things out, format with ONLY ONE CARD IN THE CAMERA AT A TIME. It's easy to format just one card and not the other without realizing.
The easy way to tell if formatting is working is take a picture. Preview the picture. Format the card. Try and preview the picture again. If t he card formats, there won't be any pictures to preview.
There is a difference between deleting pictures and formatting. Seeing that the pictures are deleted is not a guarantee that the card was formatted.
What else do you expect to see?
You said you can't tell if your cards are being formatted. If there are images on a card, you try to format it, and the format woks, you won't have the images on the card anymore. It's the only thing that visibly changes when you do a format. I don't know how else you expect to see if the formatting worked.
Format the card. If the images are gone, the format worked. If the images are still there, your camera isn't working right or you aren't doing the format right.
How has this become so complicated?
To answer your question, it becomes complicated when the format function in the menus can take a half-second or so to format a card and gives a confirmation at the end. Then if I perform the same operation with the two buttons, Mode and Trash, with the
same number of images on the card, it appears to instantly ignore the command. And when I refer to "instantly", I mean absolutely
NO TIME DELAY, NONE. It is as though the command was never given, as though the format function
INSTANTLY turned off and
INSTANTLY exited to the control screen.
Either the two-button press is not intended to perform the same function as the menu format or this camera is defective.
There are other problems, too. For instance, the pressing of the QUAL and BKT buttons does not reset the current shooting bank back to defaults.
I just bought this D800e and having done the same operation of restoring shooting banks to defaults on my previous D800, I am beginning to think the camera is defective. But having little experience, I'm not absolutely sure.