StatusCode: 0 in your Log means that Alt.Binz received an unknown response from Astra and, judging from the rest of your Log, data that it didn't know how to handle. As the download of those articles 'failed' in this way, Alt.Binz seemingly kept re-trying them with the same result, so that's why your saw a higher download count than expected. Or so I'm guessing ...
This isn't normal behaviour with Astraweb and Alt.Binz, by the way. Did you try another NZB?