Don't sweat it too much. It's Alpha and that's what Alpha's are for. I would however like to add two things... keep in mind that people logging in are doing so on there time. A reward for taking their time to identify issues like this wouldn't be a bad idea... It would also be benificial to open up a free Alpha weekend again once everything is sorted out.
GL on the bug identification and I look forward to playing in the future!
Cheers,
Blitz