I thought so too. What happened was the blood leaked down from his ear when he was hustled to the ground.
I don’t know. The blood spatter is downward across the cheek and downward still to Trump’s lip. If the shot came from the front, it would have to come from below and travel upward toward Trump’s ear. On the same BBC broadcast I mentioned, they located the person who died in the stands perpendicular to and to Trump’s left, suggesting that the shot came from Trump’s right.