I'm using **GetSellerList** API to find all Good 'Til Cancelled listings which are still Active but have zero stock, and then using `item.TimeLeft` to see which of these are at risk of automatically ending soon. One of the items returned only went out of stock this week, but `item.TimeLeft` indicates it will end in less than 2 days. I understand this is misleading because zero-stock GTC listings are automatically relisted for an additional month 3 times before ending. Q1. What should I be using for this instead of `item.TimeLeft`? Q2. Do zero-stock listings end 3 months after the last sale, or 3 months after the last listing revision? Thanks.