I have to clarify: the name on my new credit card is different than the old card, but when I told B&N to use the new one, I gave the name from the other card (or maybe they just used the old name, I don't remember).
In any case, the name that B&N has for both credit cards is the same, so the mixup I implied above doesn't exist. There is perhaps a mixup elsewhere, but not in the DRM itself.
Sorry for the false alarm. I didn't double-check my data before reporting.
The recent charges for the preordered book and the magazines aren't listed online (why not?), so it's possible that the name mixup is screwing the charging somehow, but I haven't been notified. I honestly don't know how closely anybody checks these things.