For your first problem where it said the torrent was already uploaded, just rename the file before you 'attach' it and hit upload and you should be fine. It just looks to see if there is another file with the same name on the tracker and if there is, it gives you that error.
For the second problem, what do you mean "it just went to crap"? I'm not sure what to suggest there since I have no idea what went wrong.
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