Chris,
I actually have had the opposite problem. I successfully downloaded 1, 2 and 3 together in the wee hours last night. Downloading failed on 4, 5, and 6 repeatedly when downloaded one at a time. To date, the only way I have received good files is to download at least 2 files at a time. Here's a thought: why don't you arrange for some extra bandwidth during times such as this? Even 100% successful, I really don't have 7 hours to download 13 files. To me, this akin to going on a commercial shoot with one underpowered strobe. I love you guys. But, I ordered this 2 months ago and really expect better than to be told to only use 5 % of my internet connection.
Lloyd