For example here is a deck I copied from someone else: https://deckbox.org/sets/3472148

It's the Doctor Who Precon, and the set for each card is correct here.

I have attached the generated CSV

I have also edited a similar CSV and changed the Set to all be Doctor Who. When I imported, the sets mirrored what was exported by default.

Hey. Sadly the deck imports are not properly setting the card details so everything is imported with just the default printing.

It's on my todo list, looking to work a bunch on the importers after the next release.

Sounds good! Will import my precons manually until informed otherwise!