Right now if I upload something like "0 Abomination of Gudul" through the card list functionality, it uploads 1.

If you're wondering why someone would upload 0 copies of a card, the answer is that I've gotten in the habit of just using a template list when I upload bulk cards and if I don't have any new copies of a given card, I just use the default value of 0. But I've only realized now that each time it was actually uploading 1 each time I used the list, and thus I have to manually recheck and reconcile my inventory later, which is a pain...