I know you have this bee in your bonnet about manipulation but you have to accept that it's been going on for some time, you were not the first to talk about and it's been discussed a lot before, have a look at this thread: -
viewtopic.php?f=5&t=770&hilit=farcicalTraders regulary self match their own orders for trading purposes, generally they don't do it to attempt to manipulate the market, but I guess sometimes that may be a side effect.
You have to accept that people are likely to want to manipulate a market but racing is not immune nor the only market where this goes on, or the worst affected. But one thing I have learnt over many years is that the market is the market, is the market. You either put up with it and work in and around it, or you don't participate. Those are the conditions of entry into any market. As long as you are aware of the fiobles, it's up to you to deal with them. I like seeing somebody showing their hand in the market, because that gives me the opportunity to oppose it.
This thread is more concerned with how the markets have changed this month.