After cooling down, I do recall early in the season there being something said about refs not giving fouls if they felt the player went down too easily, could this be the reason for Mitoma and Dunk penalty decisions, both refs felt the players threw themselves?
Still wondering how a Tottenham player poking the ball with his hand is not a penalty though.
I think you'll find the reason is the same as the two you mentioned above. Sheer incompetence. Like how MacAllister's goal was given for handball when we can't see it hit his arm/hand.