I just finally figured out why my card import was showing me strange results, Revised cards don't have the same collector numbers here than on scryfall...
https://deckbox.org/editions/21-revised-edition
Swamp here are:
- 299
- 300
- 301
And on Scryfall they are https://scryfall.com/search?q=swamp+set
ique=cards
- 298
- 299
- 300
I've looked around and I can't quite find the authoritative source for collector ids for these old sets, but that's certainly a discrepancy I figured was worth pointing out.
What happens in my case is that my CSV import has the card numbers looked up from Scryfall, and when importing on deckbox, I guess Swamp/Revised/298 doesn't exist, so the system fall-backs to just Swamp/Revised and merges up these cards with the closest match.
I imagine that for most cards, this discrepancy gets transparently solved by the name fallback, but in the case of basic lands, it does behave strangely.
Thanks for an awesome site!