That mechanism is already broken. I have what was the second and third orders at the .04 price for sha256. There are now 3 orders ahaid of me and the person who should be first (#5071). Perhaps two of those orders got in while doing maintance a couple of days ago, no biggie. But just today a large order #10757 usurped not only me and 5071 but like 4 others who are behind us.