Member Info for darkcorner

Hi guys, I was wondering if someone could explain something to me? I've kept an eye on this share for a couple of years now and even got lucky, managing to trade for a small profit a year or so ago. Last night about 11, I was just going through the trades for the day and I swear there were a couple there for over £100k?? I noticed at the time that the 5 share trade which is still there was apparently worth a fiver, so knew there was a mistake somewhere. That fiver one has now changed to 5p, fine, but those 100k ones have completely disappeared. My question is... how does that happen? If it was human input I'd get it, but these are automated. Felt a bit convenient given the "random" rise this week. Cheers.