I don't remember the full details, but I do have trouble in finding good posts, and I decided to award 5 merits to the guy for starting the discussion. I thought it could become useful for those members who were considering starting a mining project to learn about Bitcoin. I still intend to do this myself, but I've got too much to sort out at the moment.

If somebody looks into the merit award, they will see that it is in fact 2 awards of 5 merits, and they were made within a one minute period. This was caused by problems with using McDonalds WiFi , and it has happened on several occasions. McDonalds has two channels on their WiFi. One has the ID of "O2" ( their service provider ), and the other is " McDonalds free WiFi". Periodically the current channel will disconnect, and then the computer will auto-connect to the alternative. If this happens at the time I award some merits, then the computer may resend the submission through the new connection. I'm guessing that the confirmation packet gets lost when the old channel disconnects, and this is why it retries. Maybe somebody with more knowledge can confirm this.

I don't think it is worth worrying about this glitch, it is fairly rare, and it just means that one member will be lucky and get a few extra merits.