Sounds like it's not a good idea to reapply (re Andrew Edwards 20). I quote from the confirmation email:
"Please don't enter the ballot more than once as this could result in all your entries being cancelled."
If you got the page with the reference number (and wrote it down hopefully) you ought to be ok.
Having gone through the fiasco that was the Olympic ticket application and having read comments from past years about the VLM process, it seems the servers are faring slightly better this year.
I woke up at 5:30 (not sure why) blearily looked at Twitter on my phone and saw people had applied so fired up the laptop and did so myself. It will be my first if I'm successful, but if not I'll do another one anyway, injuries permitting.