The stock is accurately tracked. If it turns out that an article is not in stock, it can have several causes:
1. Popularity: the article is sold out that day. The stock is replenished overnight; usually the item is back in stock the next day or within a few days.
2. The item is seasonal and can not be shipped yet.
The product page displays an option to add your email address to our waitlist, we're currently out of stock of this product and we're not quite sure when more stock will arrive. Signing yourself up to this email list will give you an automatic notification as soon as the item is back in stock.