I had a call from sales on Saturday about this on my birthday
proper stressed me out because i knew the guys who had been waiting for over a week would be annoyed!
Basically what went down was - We had some units of the bundle put aside for orders of the Optic system (these had been ordered before we had run out of stock). A couple of these units were shipped accidentally to people who had paid for a bundle. It was an over enthusiastic member of our warehouse team forcing orders through that were on hold, but not doing it in date order. They must be new and didn't know about the queue or that these had been put aside for system orders, and were just acting on their own initiative. I just had a look and it looks like there was only 3 units that were shipped before sales picked up on it and stopped warehouse then called me to let me know.
For those who have ordered and are still waiting: I'm still waiting for news on the 500 units we have ordered. The last ETA I had was "end of the month". If I find out any more info then I'll let you know here!