Well, on the first one JP saw the blitz, moved to his right to avoid it and then cocked his arm back when he knew there was a guy behind him. That's why I'd blame that one on JP. It's not really an issue of, "he can have one, but not two" it's a decision making issue on the first one while the second one can't be placed on his shoulder's at all Imo.
The angriest I was all game was on that first fumble. It was just a horrible decision and one that a QB, no matter how young, should make.