[Paul B.]

You can argue that he's trying to out-level you -- he knows you can call down light, so he knows if he bets again you might interpret it to be a strong hand since it's unlikely that he'd try to bluff you again.. so he can do this as a bluff.

But given the board texture and the action in hand 2, I don't think your history should affect your river decision at all. Pretty straightforward fold.