1.As soon as I finish the first lap, it gave a MAV.
Well, you must have been driving shockingly bad and your time was greater than 2 mins. I locked the ghost recording to 2 mins max so it would have been an array index out of bounds. I'll fix it for the future by putting up a message "You drive worse than my Gran : Ghost will not be recorded" ;)
2.I can self destruct continuously without destructing the vehicle. You can change it with recovery so it teleports me back to the track.
Yes, I know about this. Damage is turned off on TimeTrial so Self destruct does nothing. I'll change it so that Self destruct on timetrial will reset you at the start in future.
Ta.