Hi, Nancy, so glad you joined the swap! No dumb questions.
I'm not sure what the rules will be in this swap either but in past swaps, I've often added more packets of seeds during a swap, especially if it's something popular that gets dibbed right away and I want to add more of that item.
Edit to say although the system will allow you to add items once the swap begins, I don't think it will allow you to take items out of the swap, even if you delete the item (after the swap has started); if someone has dibbed that item, it will still show up on your "send list".
