Discussions about Quests

[Dulcinea]

I'll put this here because it's not really a support question, just something that's been puzzling me. How come sometimes when I'm going through my co-op quests and I buy items from neighbors, I'll get a number on the left side of the slash? I know that a number on the left side means a completed quest and a number on the right means an expired quest. Why would it indicate a completed quest when all I've done is buy an ingredient? I thought maybe it meant I had a quest ready to run or that someone had helped me with an ingredient, but sometimes it shows up when I've completed any step of the quest. E.g., I just bought purple grapes for a Red Wine Aged 3 Yr quest, and I got a 1. It doesn't happen every time either. Just now and then. Is there some rhyme and reason to this or do those numbers just act quirky sometimes?