Regarding the Freak Trade in the account

I had positioned a market order to sq. off my positions, and to my shock, the order was executed at 1000 whereas the LTP of the contract was 2000 Rs away. I perceive this may very well be as a consequence of freak trades. Nevertheless, the NSE has Market Worth Safety (MPP) in place and the order ought to have been rejected by the alternate or Zerodha shouldn’t have allowed the order if the market depth was shallow.

I’ve two questions:

Does the alternate have any mechanism the place the market order will match one other market order?
Why did Zerodha permit the market order?

@ShubhS9