Its not weird for exchanges to reverse transactions done on their exchange if the price is wrong. Happens in the stock market all the time. TD Ameritrade, Etrade, Schwab, the clearing house. They all do this if things get too out of wack from the rest of the market.

I'm just not sure what you think you read, what did it mean to you and why was it interesting/absurd to you, compared to completely benign and ignorable.