. . .
BTW: I installed portable 8.2.100 on a thumb drive. I've been able to plug it into it into 3 systems - not mine, none of which have ever seen calibre, one of which was a spanking brand new just delivered Surface Pro. All three show the wrong menu when I tab to John Schember in the Book details and press the ≡ key.
I did not change any settings, or add any books - and it was a new freshly formatted thumb drive. The new Surface Pro had no add ons or any 3rd party software installed, so it was vanilla too. And Safe mode gave the same result.
Given one my Kiwi collaborators can reproduce, maybe it is a latitudinal (or time zone) phenomena
BR