Hi buddy, don't worry about cheaters, all of the users that use multiple accounts will be banned from the contest. For the order issue, do you mean that your order hasn't completed even the price of your buy order is higher than the lowest sell order?
Yes ,please see the transaction history time. Then the transaction could not be completed even at a lower price. I had to cancel because I didn't buy it.
When I canceled the purchase orders, the ETH was $ 193-194.