Scroll down to Elite Captain requests that are 2 days or older. These requests have been filled, and then cleared after the 48hrs. It also means that the Clan member hasn't made another request since then. You usually have a much better chance at getting in thier elite captains compared to someone who has just requested it an hour ago. Also, you can open the requests in a seperate window and open several at a time while still keeping your spot on the feed.