[Thex]

It's because of the backup is only done every 2 ticks, so the restore has gone back to a tick before the problem happened, ie 2 ticks before, not just one.

I personally think this was unclear as no one will remember what tick it went down, and putting an announcement up about restarting at tick 732 will not mean much to people who don't think in ticks. So if you think that the restore will happen at the tick it went down then you were wrong and hence lose your fleet or other some such disaster.