These sort of mistakes are also part of 'variance', so you have to leave them in. You might have also won some money because an opponent misclicked. Are you going to delete those because it is unfair? Just leave it in man, even if you find out how you can remove it. I lost a buy-in a week ago because my laptop decided to call an all-in against my will. Whatever, it makes my record look less pretty but it happened so it's in there.