I have followed your step by step ont he torrent, i think the open for seed needs to be checked not unchecked, i have tried various options when uploading if it is not checked how to you get it in there to seed for approval, you can download the torrent but no option to place it there, if it is checked "Azureus" now Vuze places it in the process for seeding, when you upload the torrent and re download only the "torrent" it will ask you to replace the torrent already there, and hence yes, so the torrent that you made through vuze with the seed checked makes it work. the other way only makes the torrent come up with an error as unregistered torrent.
edit: full copy of the previous message removed