It would appear that the site is recognizing that you're seeding the torrents, it's just that you're not getting any upload traffic. The most common cause of this is that you do not have the port that Vuze uses forwarded from your router to your computer in both TCP and UDP. Once you do this, your problem should go away.
Also, I see that you are seeding a number of torrents for which there are few other seeders. I will freeleech these torrents for 156 hours to help you get some upload traffic. One of them, you are actually the only seeder on, so it should start to pickup for you soon.