It's a real shame that the "New" page here is plagued by some kind of activists who flag and kill almost every link posted. What is wrong with people?
Two issues:
1. Every bookmark will have the title "Untitled". It should be easy for you to get the title from the meta tags.
2. After adding a feed, there is no indication of success. Maybe the "Subscriptions" tab should be default, instead of "Discoveries"?