Looks like some people like to play pre-open games.
Make sure you don't follow these misleading sell orders - otherwise you'll be among the few ones who sell at a ridiculous low price just before these stupid big sell bids are withdrawn.
We have seen this before. The only worry I have is that this time there were quite a few and big sell orders. Almost looks like some people try to drive the sp down to get a big packet at a rock bottom price.