This must be trivia night for the forum!
If I'm not mistaken, user 2 was a test account I created when I was testing the forum. It was easier for me to create an administrators account and a registered members account, and simply log in under the registered members account when I wanted to see how something looked from a registered members access. After I was done, I didn't think that by deleting the ghost account I'd be upsetting the cosmic order of the forum

This answers the other part of your question. I delete many accounts. Spam-bots register and when they can't complete the registration process (many are robots programmed to register on a forum, post a message, then go away to the next) they just sit there in their own special group which has no posting privileges. When I delete them, the user number is taken forever.
At least I think that is right..we are talking about over 6 years ago
Regarding SND 1, there are several threads on this forum that talk about it, but you can get the gist of it by reading through this FAQ:
http://www.soviet-awards.com/forum/sovie...2-0-a.html
Now, here's some trivia: A few years ago, I had a contest. Members had to find as many images of 3x winners of the Hero of Socialist Labor. The photos had to show the recipient, with his 3x bar of HSLs. The 100,000 Ruble question..what was the grand prize that went to the winner? (no fair looking to deeply into old messages on the forum. It might still be there)